Evaluate 20*3.14

$20 \cdot 3.14$

Step 1

Multiply using long multiplication.

Multiply $4$ by $0$ . Place the result in the next column in the result line. There is one result line for each digit in $3.14$ .


		$2$	$0$
$⨯$	$3$	. $1$	$4$
			$0$

Multiply $4$ by $2$ . Place the result in the next column in the result line. There is one result line for each digit in $3.14$ .


		$2$	$0$
$⨯$	$3$	. $1$	$4$
		$8$	$0$

Multiply $1$ by $0$ . Place the result in the next column in the result line. There is one result line for each digit in $3.14$ .


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

Multiply $1$ by $2$ . Place the result in the next column in the result line. There is one result line for each digit in $3.14$ .


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

Multiply $3$ by $0$ . Place the result in the next column in the result line. There is one result line for each digit in $3.14$ .


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

Multiply $3$ by $2$ . Place the result in the next column in the result line. There is one result line for each digit in $3.14$ .


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

Add the numbers in each column. In this case, add $0 + 0 + 0$ , then place the $0$ in the result line.


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

Add the numbers in each column. In this case, add $8 + 0 + 0$ , then place the $8$ in the result line.


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

Add the numbers in each column. In this case, add $0 + 2 + 0$ , then place the $2$ in the result line.


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

Add the numbers in each column. In this case, add $0 + 0 + 6$ , then place the $6$ in the result line.


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


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

Step 2

To find the number of decimal places needed in the answer, add the number of decimal places in the multiplier and multiplicand. In this case, there is a total of $2$ , so the answer must have $2$ decimal places as well.

$62.8$

Evaluate 20*3.14

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