Evaluate 28.4*9.78

Math
28.4⋅9.78
Multiply using long multiplication.
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Multiply 8 by 4. Place the ones digit (2) in the result line and carry the tens digit (3). There is one result line for each digit in 9.78.
3
28.4
⨯9.78
2
Multiply 8 by 8 and add the carried 3. Place the ones digit (7) in the result line and carry the tens digit (6). There is one result line for each digit in the 9.78.
63
28.4
⨯9.78
72
Multiply 8 by 2 and add the carried 6. Place the ones digit (2) in the result line and carry the tens digit (2). There is one result line for each digit in the 9.78.
28.4
⨯9.78
2272
Multiply 7 by 4. Place the ones digit (8) in the result line and carry the tens digit (2). There is one result line for each digit in 9.78.
2
28.4
⨯9.78
2272
8
Multiply 7 by 8 and add the carried 2. Place the ones digit (8) in the result line and carry the tens digit (5). There is one result line for each digit in the 9.78.
52
28.4
⨯9.78
2272
88
Multiply 7 by 2 and add the carried 5. Place the ones digit (9) in the result line and carry the tens digit (1). There is one result line for each digit in the 9.78.
28.4
⨯9.78
2272
1988
Multiply 9 by 4. Place the ones digit (6) in the result line and carry the tens digit (3). There is one result line for each digit in 9.78.
3
28.4
⨯9.78
2272
1988
6
Multiply 9 by 8 and add the carried 3. Place the ones digit (5) in the result line and carry the tens digit (7). There is one result line for each digit in the 9.78.
73
28.4
⨯9.78
2272
1988
56
Multiply 9 by 2 and add the carried 7. Place the ones digit (5) in the result line and carry the tens digit (2). There is one result line for each digit in the 9.78.
28.4
⨯9.78
2272
1988
2556
Add the numbers in each column. In this case, add 2+0+0, then place the 2 in the result line.
28.4
⨯9.78
2272
1988
2556
2
Add the numbers in each column. In this case, add 7+8+0, then place the 5 in the result line and carry the 1.
28.4
⨯9.78
2272
1988
2556
52
Add the numbers in each column. In this case, add 2+8+6+1, then place the 7 in the result line and carry the 1.
28.4
⨯9.78
2272
1988
2556
752
Add the numbers in each column. In this case, add 2+9+5+1, then place the 7 in the result line and carry the 1.
28.4
⨯9.78
2272
1988
2556
7752
Add the numbers in each column. In this case, add 0+1+5+1, then place the 7 in the result line.
28.4
⨯9.78
2272
1988
2556
77752
Add the numbers in each column. In this case, add 0+0+2, then place the 2 in the result line.
28.4
⨯9.78
2272
1988
2556
277752
28.4
⨯9.78
2272
1988
2556
277752
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 3, so the answer must have 3 decimal places as well.
277.752
Evaluate 28.4*9.78

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