Old man voice Calculator

A computer discovered in the northern part of a Prefecture.
Once installed, its simply irresistible.

Overview:
Yesterday, on August 15th, the usual old man (60 years old) and the dirty-minded younger brother who emailed me recently (45 years old), and me (53 years old), three of us, installed it under the riverbank in the northern part of the prefecture.

Today is a day off tomorrow, so we bought alcohol and snacks at the convenience store and came to a place where hardly anyone visits. We drank plenty and then did some calculations there.

Hidden Commands:
The command is to mimic the Wild Beast Calculator (= after pressing the number)
810, 114514, 889464, 364364, 893, 931, 721
When it becomes like this, hidden audio will be played... Ah, its irresistible.
And a special hidden command
＿人人人人人人人＿
＞816071422＜
￣YYYYYYYYYY￣
If you type this...
For those who want to check what is played back, please install it immediately.

How to Play:
A calculator app that calculates in an old mans voice.
With this innovative calculator, you can perform calculations not only with your fingers but also with your ears. After the calculation is done, the old man will tell you the answer.