Decimal Multiply / Divide Calculator
Two calculators with every step shown: place-counting multiplication and point-shifting division.
Multiply decimals
Counts the decimal places, multiplies as whole numbers, then places the point.
places in product = places in a + places in b
Divide decimals
Shifts the divisor to a whole number, shifts the dividend the same amount, then divides. Terminating quotients are exact; repeating ones show 6 digits.
a ÷ b → shift both points until b is whole