# Multiply 0.80*80 0.8⋅80
Multiply using long multiplication.
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 80.
 0 .8 0 ⨯ 8 0 0
Multiply 0 by 8. Place the result in the next column in the result line. There is one result line for each digit in 80.
 0 .8 0 ⨯ 8 0 0 0
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 80.
 0 .8 0 ⨯ 8 0 0 0 0
Multiply 8 by 0. Place the result in the next column in the result line. There is one result line for each digit in 80.
 0 .8 0 ⨯ 8 0 0 0 0 0
Multiply 8 by 8. Place the ones digit (4) in the result line and carry the tens digit (6). There is one result line for each digit in 80.
 6 0 .8 0 ⨯ 8 0 0 0 0 4 0
Multiply 8 by 0 and add the carried 6. Place the result in the next column in the result line. There is one result line for each digit in 80.
 0 .8 0 ⨯ 8 0 0 0 0 6 4 0
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
 0 .8 0 ⨯ 8 0 0 0 0 6 4 0 0
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
 0 .8 0 ⨯ 8 0 0 0 0 6 4 0 0 0
Add the numbers in each column. In this case, add 0+4, then place the 4 in the result line.
 0 .8 0 ⨯ 8 0 0 0 0 6 4 0 4 0 0
Add the numbers in each column. In this case, add 0+6, then place the 6 in the result line.
 0 .8 0 ⨯ 8 0 0 0 0 6 4 0 6 4 0 0
 0 .8 0 ⨯ 8 0 0 0 0 6 4 0 6 4 0 0
To find the number of decimal places needed in the answer, add the number of decimal places in the multiplier and multiplicand. In this case, there is a total of 2, so the answer must have 2 decimal places as well.
64
Multiply 0.80*80

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