The second grade math quotient is (dividend-remainder) ο divisor = quotient. In the division formula, the relationship among dividend, remainder, divisor and quotient is: (dividend-remainder) ο divisor = quotient, recorded as dividend ο divisor = quotient ... remainder, and then deduced.

Dividend and divisor expand or shrink by the same factor at the same time, and the quotient remains unchanged. In division, the dividend is constant, the divisor is enlarged (or reduced) several times, but the quotient is reduced (or expanded) by the same multiple. In division, the divisor is constant, the dividend is expanded (or reduced) several times, and the quotient is also expanded (or reduced) by the same multiple.