Basic Math Examples

Evaluate 0.30*100
0.3100
Step 1
Multiply using long multiplication.
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Step 1.1
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
0
Step 1.2
Multiply 0 by 3. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
00
Step 1.3
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
Step 1.4
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
0
Step 1.5
Multiply 0 by 3. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
00
Step 1.6
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
000
Step 1.7
Multiply 1 by 0. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
000
0
Step 1.8
Multiply 1 by 3. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
000
30
Step 1.9
Multiply 1 by 0. Place the result in the next column in the result line. There is one result line for each digit in 100.
0.30
100
000
000
030
Step 1.10
Add the numbers in each column. In this case, add 0+0+0, then place the 0 in the result line.
0.30
100
000
000
030
0
Step 1.11
Add the numbers in each column. In this case, add 0+0+0, then place the 0 in the result line.
0.30
100
000
000
030
00
Step 1.12
Add the numbers in each column. In this case, add 0+0+0, then place the 0 in the result line.
0.30
100
000
000
030
000
Step 1.13
Add the numbers in each column. In this case, add 0+0+3, then place the 3 in the result line.
0.30
100
000
000
030
3000
0.30
100
000
000
030
3000
Step 2
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.
30
0.30100
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 [x2  12  π  xdx ]