Play: 2, OK 1, learn, 7, number: 8.

Rule out 0 first, because the two numbers are obviously different, and so is 1. If play = 1, the number is equal to 4, and 4*4= 16, and play is not 6, then 1 is also wrong. So the game is 2, the number is 8, and then the number represented by "good" is multiplied by 4, which means that good can only be 0, 1, 2,2 has been excluded, and 0 is easily excluded, because if good is 0, there is no number multiplied by 4+3, and the last number is 0, so good can only be 1.

Calculation rules of multiplication:

(1) number alignment. Starting from the right, multiply the first factor by the number on each bit of the second factor, and the end of the number will be aligned with which bit of the second factor.

(2) Then add up the numbers multiplied several times.

Multiplication with zeros at the end of an integer: you can multiply the numbers before zeros first, then see how many zeros are at the end of each factor, and then add a few zeros at the end of the multiplied number.