44.1
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5*3=15
carry over the one to the next #
3*1=3
add a one
put down a zero and go next with the # 6 multiplied by 5
6*5= 30
now add a three to 6 because 6*1=6
finally 6*1=6
then add up numbers
move decimal point over one space so that answer reads 13.5
Sticking to integers: 7 x 9 = 63 3 x 21 = 63 1 x 63 = 63
1 x 63, 3 x 21, 7 x 9
1 x 63, 3 x 21, 7 x 9
Multiply 90 x .63= 56.7 is 63% of 90
7 x 9 = 63... 63 x 5 = 315