This is a division in which the orbital divisor is a single digit and the remainder is 7, so the divisor can only be 8 or 9 (the remainder is less than the divisor).

When the divisor is 8, the ten digits of the unit product of 8 and quotient is 5, so the unit of quotient can only be 7, so the quotient in the division formula is 37. The dividend is 8× 37+7 = 303, that is, 303 ÷ 8 = 37+7.

When the divisor is 9, the decimal digit of the unit product of 9 and quotient is 5, so the unit of quotient can only be 6, so the quotient in the division formula is 36. The dividend is 9× 36+7 = 33 1, that is, 303 ÷ 9 = 36+7.