Basic Math Examples

21 \cdot 3

$21 \cdot 3$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

3

$3$ by

1

$1$ . Place the result in the next column in the result line. There is one result line for each digit in

3

$3$ .


	$2$ $2$	$1$ $1$
$⨯$ $⨯$		$3$ $3$
		$3$ $3$

Step 1.2

Multiply

3

$3$ by

2

$2$ . Place the result in the next column in the result line. There is one result line for each digit in

3

$3$ .


	$2$ $2$	$1$ $1$
$⨯$ $⨯$		$3$ $3$
	$6$ $6$	$3$ $3$

Step 1.3

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

3

$3$ , then place the

3

$3$ in the result line.


	$2$ $2$	$1$ $1$
$⨯$ $⨯$		$3$ $3$
	$6$ $6$	$3$ $3$
		$3$ $3$

Step 1.4

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

6

$6$ , then place the

6

$6$ in the result line.


	$2$ $2$	$1$ $1$
$⨯$ $⨯$		$3$ $3$
	$6$ $6$	$3$ $3$
	$6$ $6$	$3$ $3$


	$2$ $2$	$1$ $1$
$⨯$ $⨯$		$3$ $3$
	$6$ $6$	$3$ $3$
	$6$ $6$	$3$ $3$

Step 2

The result of

21 \cdot 3

$21 \cdot 3$ is

63

$63$ .

63

$63$

21 \cdot 3

$21 \cdot 3$

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