Basic Math Examples

Multiply 42*20
42204220
Step 1
Multiply using long multiplication.
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Step 1.1
Multiply 0 by 2. Place the result in the next column in the result line. There is one result line for each digit in 20.
42
20
0
Step 1.2
Multiply 0 by 4. Place the result in the next column in the result line. There is one result line for each digit in 20.
42
20
00
Step 1.3
Multiply 2 by 2. Place the result in the next column in the result line. There is one result line for each digit in 20.
42
20
00
4
Step 1.4
Multiply 2 by 4. Place the result in the next column in the result line. There is one result line for each digit in 20.
42
20
00
84
Step 1.5
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
42
20
00
84
0
Step 1.6
Add the numbers in each column. In this case, add 0+4, then place the 4 in the result line.
42
20
00
84
40
Step 1.7
Add the numbers in each column. In this case, add 0+8, then place the 8 in the result line.
42
20
00
84
840
42
20
00
84
840
Step 2
The result of 4220 is 840.
840
 [x2  12  π  xdx ]