Multiply 0.79*509

Math
0.79⋅509
Multiply using long multiplication.
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Multiply 9 by 9. Place the ones digit (1) in the result line and carry the tens digit (8). There is one result line for each digit in 509.
8
0.79
⨯509
1
Multiply 9 by 7 and add the carried 8. Place the ones digit (1) in the result line and carry the tens digit (7). There is one result line for each digit in the 509.
78
0.79
⨯509
11
Multiply 9 by 0 and add the carried 7. Place the result in the next column in the result line. There is one result line for each digit in 509.
0.79
⨯509
711
Multiply 0 by 9. Place the result in the next column in the result line. There is one result line for each digit in 509.
0.79
⨯509
711
0
Multiply 0 by 7. Place the result in the next column in the result line. There is one result line for each digit in 509.
0.79
⨯509
711
00
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 509.
0.79
⨯509
711
000
Multiply 5 by 9. Place the ones digit (5) in the result line and carry the tens digit (4). There is one result line for each digit in 509.
4
0.79
⨯509
711
000
5
Multiply 5 by 7 and add the carried 4. Place the ones digit (9) in the result line and carry the tens digit (3). There is one result line for each digit in the 509.
34
0.79
⨯509
711
000
95
Multiply 5 by 0 and add the carried 3. Place the result in the next column in the result line. There is one result line for each digit in 509.
0.79
⨯509
711
000
395
Add the numbers in each column. In this case, add 1+0+0, then place the 1 in the result line.
0.79
⨯509
711
000
395
1
Add the numbers in each column. In this case, add 1+0+0, then place the 1 in the result line.
0.79
⨯509
711
000
395
11
Add the numbers in each column. In this case, add 7+0+5, then place the 2 in the result line and carry the 1.
0.79
⨯509
711
000
395
211
Add the numbers in each column. In this case, add 0+0+9+1, then place the 0 in the result line and carry the 1.
0.79
⨯509
711
000
395
0211
Add the numbers in each column. In this case, add 0+0+3+1, then place the 4 in the result line.
0.79
⨯509
711
000
395
40211
0.79
⨯509
711
000
395
40211
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.
402.11
Multiply 0.79*509

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