カケルカ　ケルカ (Kakeruka Keruka)

A card guessing game in which players play by multiplying two cards in their hands! Kakeru Kakeruka is a card game in which you fight with two cards in your hand. Before the fight begins, multiply the two cards in your hand to form a large number! The numbers on the cards are 0~7, plus -1 and -50. You can collect the large number by relying on the positive cards, or you can risk it and try to collect two negative cards to guarantee a win! Each card has an effect when placed on the field. Use them to make a better hand or to determine everyone else's number! Cards with an identical number are stacked on top of each other, and when there are three piles of stacked cards, the game is over! Should you go out now or wait until your next turn...?