Basic Math Examples

4 \cdot 21

$4 \cdot 21$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

1

$1$ by

4

$4$ . Place the result in the next column in the result line. There is one result line for each digit in

21

$21$ .

Step 1.2

Multiply

2

$2$ by

4

$4$ . Place the result in the next column in the result line. There is one result line for each digit in

21

$21$ .

Step 1.3

Add the numbers in each column. In this case, add

4 + 0

$4 + 0$ , then place the

4

$4$ in the result line.

Step 1.4

Add the numbers in each column. In this case, add

0 + 8

$0 + 8$ , then place the

8

$8$ in the result line.

Step 2

The result of

4 \cdot 21

$4 \cdot 21$ is

84

$84$ .

84

$84$