Basic Math Examples

$18 \cdot 28$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

$8$ by

$8$ . Place the ones digit

$(4)$ in the result line and carry the tens digit

$(6)$ . There is one result line for each digit in

$28$ .

	$6$
	$1$	$8$
$⨯$	$2$	$8$
		$4$

Step 1.2

Multiply

$8$ by

$1$ and add the carried

$6$ . Place the ones digit

$(4)$ in the result line and carry the tens digit

$(1)$ . There is one result line for each digit in the

$28$ .


	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$

Step 1.3

Multiply

$2$ by

$8$ . Place the ones digit

$(6)$ in the result line and carry the tens digit

$(1)$ . There is one result line for each digit in

$28$ .

	$1$
	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$
	$6$

Step 1.4

Multiply

$2$ by

$1$ 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

$28$ .


	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$
$3$	$6$

Step 1.5

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

$4 + 0$ , then place the

$4$ in the result line.


	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$
$3$	$6$
		$4$

Step 1.6

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

$4 + 6$ , then place the

$0$ in the result line and carry the

$1$ .


	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$
$3$	$6$
	$0$	$4$

Step 1.7

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

$1 + 3 + 1$ , then place the

$5$ in the result line.


	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$
$3$	$6$
$5$	$0$	$4$


	$1$	$8$
$⨯$	$2$	$8$
$1$	$4$	$4$
$3$	$6$
$5$	$0$	$4$

Step 2

The result of

$18 \cdot 28$ is

$504$ .

$504$