Basic Math Examples

18 \cdot 40

$18 \cdot 40$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

0

$0$ by

8

$8$ . Place the result in the next column in the result line. There is one result line for each digit in

40

$40$ .


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
		$0$ $0$

Step 1.2

Multiply

0

$0$ by

1

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

40

$40$ .


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$

Step 1.3

Multiply

4

$4$ by

8

$8$ . Place the ones digit

(2)

$(2)$ in the result line and carry the tens digit

(3)

$(3)$ . There is one result line for each digit in

40

$40$ .

	$3$ $3$
	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$
	$2$ $2$

Step 1.4

Multiply

4

$4$ by

1

$1$ and add the carried

3

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

40

$40$ .


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$
$7$ $7$	$2$ $2$

Step 1.5

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

0 + 0

$0 + 0$ , then place the

0

$0$ in the result line.


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$
$7$ $7$	$2$ $2$
		$0$ $0$

Step 1.6

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

0 + 2

$0 + 2$ , then place the

2

$2$ in the result line.


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$
$7$ $7$	$2$ $2$
	$2$ $2$	$0$ $0$

Step 1.7

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

0 + 7

$0 + 7$ , then place the

7

$7$ in the result line.


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$
$7$ $7$	$2$ $2$
$7$ $7$	$2$ $2$	$0$ $0$


	$1$ $1$	$8$ $8$
$\times$ $⨯$	$4$ $4$	$0$ $0$
	$0$ $0$	$0$ $0$
$7$ $7$	$2$ $2$
$7$ $7$	$2$ $2$	$0$ $0$

Step 2

The result of

18 \cdot 40

$18 \cdot 40$ is

720

$720$ .

720

$720$