you multiply it as you would regular numbers and then you count the places that the decimal is in front of. in this case it would be 2 numbers, then in the number you got by multiplying, move the decimal 2 places up
First u multiply without the points then u count the number of digits with points like in 87.8 there is one digit with point then in 66.4 there is one digit with point so total there is 2digits with point
Then u count from right two digits and put the point .
