How do you simplify #9.44\times 70.8#?
You can do long multiplication.
Ignore the decimal places for now:
(There was no point in multiplying by the middle number, 0)
Now count how many decimal places there were altogether in the original numbers. There were
There must be the same number of places in the final answer.
As a final check, do a quick estimate of the size of the answer.
An answer of