I’ll assume the question is asking how many games of ping pong the girls played together.
There’s 4 girls who play ping pong after school, each girl played exactly three games.
Each girl played the same amount of ping pong games. 1 girl played three games, 2 girls played six games and so on.
You multiply the number of girls with the amount of ping pong games that each girl played.
4x3=12
It should be 12
