Office workers eat together every day, and students often get together to eat snacks and chat. When calculating the cost of meals, coffee, snacks, taxis, etc. at such gatherings, it is a game that divides the cost according to the ratio according to the ratio, which is a bit burdensome even if it is said to be 1/n, or it is a bit burdensome to pay alone every time.

Climbing ladders, etc., set the amount of each person in advance, but in this game, you just press a button and it will be set for good or bad luck.