Basic Math Examples

Evaluate 99*99
9999
Step 1
Multiply using long multiplication.
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Step 1.1
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 99.
8
99
99
1
Step 1.2
Multiply 9 by 9 and add the carried 8. Place the ones digit (9) in the result line and carry the tens digit (8). There is one result line for each digit in the 99.
99
99
891
Step 1.3
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 99.
8
99
99
891
1
Step 1.4
Multiply 9 by 9 and add the carried 8. Place the ones digit (9) in the result line and carry the tens digit (8). There is one result line for each digit in the 99.
99
99
891
891
Step 1.5
Add the numbers in each column. In this case, add 1+0, then place the 1 in the result line.
99
99
891
891
1
Step 1.6
Add the numbers in each column. In this case, add 9+1, then place the 0 in the result line and carry the 1.
99
99
891
891
01
Step 1.7
Add the numbers in each column. In this case, add 8+9+1, then place the 8 in the result line and carry the 1.
99
99
891
891
801
Step 1.8
Add the numbers in each column. In this case, add 0+8+1, then place the 9 in the result line.
99
99
891
891
9801
99
99
891
891
9801
Step 2
The result of 9999 is 9801.
9801
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 [x2  12  π  xdx ]