Like a fraction multiplied by an integer or an integer multiplied by a fraction, it is a special fractional multiplication. Because integers can be used as fractions with a denominator of 1. Therefore, when a fraction is multiplied by an integer or an integer is multiplied by a fraction, the product of the numerator of the fraction multiplied by an integer is taken as a subnumber, and the denominator remains unchanged (the denominator is multiplied by 1 remains unchanged). Provide scores that can be reduced, and the result is that false scores become scores.