In the trick-taking game 割算: １・２・３からはじめるトリックテイキング (Division: Trick-taking starting with 1, 2, 3), the deck consists only of cards numbered 1-3. Each player starts with a pair of cards in front of them that make a two-digit number, then in turn order they each play a third card that divides this number, e.g. 12 divided by 3 or 23 divided by 2. Whoever has the largest quotient wins the round, scoring points equal to the divisor they played, then for each player the second numeral in the dividend drops down in front of the divisor to create a new two-digit number. The winner then leads a card, and everyone follows. Keep playing tricks until the cards run out. Whoever scores the most points wins.

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