Treasure Tree Festival in 2 days. We are scheduled to head to the site the day before, so we will leave for the Elf Forest tomorrow.

The Elf Forest seems to be a very lush place, and I am very excited to be out of the Sinfonia King's Capital for the first time.

And I can teach Clo new magic, the means of self-defense that I thought about more than before, so that I can protect my position when I have to... did I?

"Yeah. I think it's coming in shape... Kite, you can't use this magic too much. The burden on the body is heavy, too. Well, right now, I think I'm feeling it..."

"... my whole body hurts"

"Look, I'll put some healing magic on you, so just sit tight."

I learned a new magic, and as a result I fell down with pain like a general muscle ache, and Crowe smiles bitterly at me for healing magic.

It is wrapped in a twitchy, warm light and relieves the general pain that was painful to paralyze.

The type of combat magic that draws on the sensitivity magic taught by Crowe is the type that has recoil, and I can't use it for long with even less magic power, and it really feels like I said emergency magic.

It's just magic that held me to the request I had in mind, and it has an interesting performance inside... well, I've never gone beyond using it...

Speaking of which, I wanted to ask Crowe something.

"Yeah?"

"Is there a calculator in this world that resembles a machine?

"Dentak? What kind of kikai seihin is that?

Apparently, the calculator isn't coming from any other brave role, and I'm going to explain the calculator to Crowe.

I also thought for a moment why the mayonnaise and all that stuff was telling me, but on second thought, I didn't think of Lilia at all until I saw how she was struggling with the calculations either.

That said, I deposited the machine product as soon as I came to this world, and I had a preconceived notion that I couldn't have the machine product somewhere in my mind, and I didn't think that I might be able to reproduce it with a magic device because I didn't know that the magic device could be created personally.

The fact that there were preconceptions about the role of brave men in the past is probably equally true. And most importantly, unlike me right now, I hear you're busy being a brave man.

Anyway, I don't think there's much to do with accounting compared to food, clothing, books, etc., which are familiar items, or entertainment on the move, in order to make speeches around the world in a year.

With that in mind, tell Crowe about the calculator, something similar? Ask if it is possible to reproduce it without it.

"... that's what Kite thought?

"Huh? No, it was just a common tool in the world I was in."

……

Clo, having finished listening to me, gives me a pretty surprised look at first, then hands on his chin and silences for a while.

"... you can reproduce it. But I didn't think about it. If we do record the formula as a surgical formula, we can do the calculation in an instant..."

"But?"

"I didn't think about that at all. Magic and math are separate, and there was no idea per se to magically support computation. If you ask me, I wonder why I never thought of it before."

If you ask me, I can convince you that it's complete.

The machine we had in our world… Science is, in a sense, a thing that has been linked to mathematics from the beginning.

But the magic in this world is different from science, and the idea of linking it to mathematics didn't seem to exist in itself.

In that sense, I guess it was really genius to say the first person to make a calculator or computer...

Crowe again silences for a while before taking out the paper and pen and writing something down.

And when it's over, the black coat spreads like a curtain, and he speaks toward it.

Zex, are you there?

"What's wrong? Oh? This is Lord Miyama. We're out of time."

"It's been a while. Mr. Zex."

What emerged from it was Mr. Zex, a mask that some ethnic group seemed to use in the ritual, and even though I had met him before, I was stuck by surprise when only bone hands appeared.

I do hear stories I've heard before when I met him that he usually wears a ritual mask so that it's easy to distinguish him from the other rich.

Sure, it's easy to understand, but this makes me look like I'm gonna be at a carnival. Well, it's my personal hobby around there, so let's not pinch my mouth.

A gentle greeting with Mr. Zex, who showed up, gives Mr. Zex the paper on which Crowe was writing something earlier.

"This is the magic tool that Kate thought of, and I tried to make it into a technique..."

"... this is... what an idea like this!?

No, it's not like I thought about it, I just gave you the details of the tools that were in the original world...

"What do you think?

"... there will be a revolution."

"Looking like we could mass produce?

"Yeah, that's Master Chrome. With this technique, you can make it fairly inexpensive."

Uh, what is it? I think something is getting bigger and bigger.

As far as I'm concerned, I wish I could have Chro make a calculator-like magic fixture and give that to Lilia - I've been thinking about it to the extent that it's not normal for Chro and Zex to be in shape.

"Kite. Can I make this at my shop and sell it?

"Huh? Oh, yeah. I don't mind at all, but I didn't invent it."

Crowe asked me with a serious look, so I said I wouldn't mind that.

Then Crowe nodded once and then turned to Mr. Zex.

"Thanks. Bye, Zex"

"Yeah, then it's Lord Miyama's right... how about 'half the net profit' from this magic appliance?

"... to?

Is that it? It's been a strange story. Half of your net income? So you're saying you can get paid?

"Fundamentals will be paid on a monthly basis"

"Oh, no, wait, wait! It's not what I invented, it's what was in the original world..."

"Yeah. In this world, Kite is the inventor."

"To?"

What are we gonna do? In short, that means I have a patent right...... here. Isn't that really the flow of a lot of money rolling in?

No, it's not that I don't like getting paid either... even though I've only been in this world for a year and now I'm suspicious if I can spend the money Lilia gave me... Lilia? Oh, yeah.

"For example, Mr. Lilia... do you mind if I give you your rights to the Duke of Alberto family?

"Yeah, of course you don't mind that. What to do with that right is Lord Miyama's freedom. However, if you do, it would be better if the Duke of Alberto could talk to you once."

"Right. Oh, yeah. Zex, you're going to Lilia's next time, right? What if Kite talked to you then?

"Well, I guess... by then, we'll be producing this magic tool and actually looking at it."

"Oh, that helps"

Apparently, it is certain that you can build a calculator (tentative), and this will make Lilia's work easier.

I honestly wish I had enough money to enjoy this world, and if Mr. Lilia doesn't mind rights or anything like that, I'm fine with giving it all up.

Dear Sir, Mother, Father - When I talked to Chro about making a calculator, something about rights and all sorts of things got bigger. In short, if we can have a calculator in this world like this, I'll be the... patent holder.

The sound of the pen, which was echoing in the quiet office, stopped and Lilia raised her face, which was pointed at the paperwork.

"... what is it? There's a terrible chill right now..."

Lilia whined slightly blue-faced...... it was only a few days later that the hunch became a reality......