Multiplying by 125
Use the following steps to multiply mentally by 125.
 Multiply the number by 5 first, then divide that product
by 4.
 If the remainder is 0, write 00 after the quotient.
 If the remainder is 1, write 25 after the quotient.
 If the remainder is 2, write 50 after the quotient.
 If the remainder is 3, write 75 after the quotient.
Example:
27 Ã— 125 =
Multiply 27 by 5, and then divide by 4.
27 Ã— 5 = 135, 135 Ã· 4 = 33 (remainder 3)
Since the remainder is 3, write 75 after 33.
27 Ã— 125 = 3375
Example:
661 Ã— 125 =
Multiply 661 by 5, and then divide by 4.
661 Ã— 5 = 3305, 3305 Ã· 4 = 826 (remainder = 1)
Since the remainder is 1, write 25 after the 826.
661 Ã— 125 = 82625
