Basic Math Examples

$30 \cdot 70$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

$0$ by

$0$ . Place the result in the next column in the result line. There is one result line for each digit in

$70$ .


	$3$	$0$
$⨯$	$7$	$0$
		$0$

Step 1.2

Multiply

$0$ by

$3$ . Place the result in the next column in the result line. There is one result line for each digit in

$70$ .


	$3$	$0$
$⨯$	$7$	$0$
	$0$	$0$

Step 1.3

Multiply

$7$ by

$0$ . Place the result in the next column in the result line. There is one result line for each digit in

$70$ .


	$3$	$0$
$⨯$	$7$	$0$
	$0$	$0$
	$0$

Step 1.4

Multiply

$7$ by

$3$ . Place the ones digit

$(1)$ in the result line and carry the tens digit

$(2)$ . There is one result line for each digit in

$70$ .


		$3$	$0$
	$⨯$	$7$	$0$
		$0$	$0$
$2$	$1$	$0$

Step 1.5

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

$0 + 0$ , then place the

$0$ in the result line.


		$3$	$0$
	$⨯$	$7$	$0$
		$0$	$0$
$2$	$1$	$0$
			$0$

Step 1.6

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

$0 + 0$ , then place the

$0$ in the result line.


		$3$	$0$
	$⨯$	$7$	$0$
		$0$	$0$
$2$	$1$	$0$
		$0$	$0$

Step 1.7

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

$0 + 1$ , then place the

$1$ in the result line.


		$3$	$0$
	$⨯$	$7$	$0$
		$0$	$0$
$2$	$1$	$0$
	$1$	$0$	$0$

Step 1.8

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

$0 + 2$ , then place the

$2$ in the result line.


		$3$	$0$
	$⨯$	$7$	$0$
		$0$	$0$
$2$	$1$	$0$
$2$	$1$	$0$	$0$


		$3$	$0$
	$⨯$	$7$	$0$
		$0$	$0$
$2$	$1$	$0$
$2$	$1$	$0$	$0$

Step 2

The result of

$30 \cdot 70$ is

$2100$ .

$2100$