"Arithmetic King" exercises your verbal arithmetic skills through gameplay. There are currently two different gameplays and 4 game modes. The number range of arithmetic can be set as you like, so that people of different abilities can continue to exercise their arithmetic skills. There is also a two-player mode in the game. Whether you are interacting with your friends or challenging each other with friends, it is very interesting, so you will no longer be bored in a single machine and lose your