Because there is 8.7 in the quotient, and the divisor multiplied by 2 digits only gets the product of 2 digits (less than 100), the highest digit of the divisor can only be 1, and the highest digit of the quotient multiplied by the divisor must be 3 digits (greater than 100), so the 1 digit of the quotient can only be a number greater than 8. The highest digit of quotient can only be 9, and the product of quotient and divisor needs 3 digits (greater than 100), so the divisor must be at least greater than 1 1.

Expressed by equation, that is, let the divisor be x,

8x< 100,< 100,> 100, the divisor can only be x= 12, and then multiply the quotient by the divisor 12*9807 to get the dividend.

The quotient is 9807, the left divisor is 12 and the dividend is12 * 9807 =117684.

The earliest hong merchants,

The second line of the dividing line, dividends,

The third line, the fourth line. . . Just multiply each bit of the quotient by the divisor 12. You should be fine with this part.