Basic Math Examples

Popular Problems
Basic Math
Evaluate 0.20*70
0.2⋅70
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 70.
0.20
⨯70
0
Step 1.2
Multiply 0 by 2. Place the result in the next column in the result line. There is one result line for each digit in 70.
0.20
⨯70
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 70.
0.20
⨯70
000
Step 1.4
Multiply 7 by 0. Place the result in the next column in the result line. There is one result line for each digit in 70.
0.20
⨯70
000
0
Step 1.5
Multiply 7 by 2. Place the ones digit (4) in the result line and carry the tens digit (1). There is one result line for each digit in 70.
1
0.20
⨯70
000
40
Step 1.6
Multiply 7 by 0 and add the carried 1. Place the result in the next column in the result line. There is one result line for each digit in 70.
0.20
⨯70
000
140
Step 1.7
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.20
⨯70
000
140
0
Step 1.8
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.20
⨯70
000
140
00
Step 1.9
Add the numbers in each column. In this case, add 0+4, then place the 4 in the result line.
0.20
⨯70
000
140
400
Step 1.10
Add the numbers in each column. In this case, add 0+1, then place the 1 in the result line.
0.20
⨯70
000
140
1400
0.20
⨯70
000
140
1400
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.
14
 [x2  12  π  ∫⁡xdx ]