The number of a 13 is equal to the number of B______ As the unit "1,"______ ×13=______ .

The number of a 13 is equal to the number of B______ As the unit "1,"______ ×13=______ .

The number a 13 is equal to the number B. the number a is regarded as the unit "1", and the number a × 13 = the number B. so the answer is: number a, number a, number B