Solve 45*21=

$$45 \times 21=$$

Evaluate

$$945$$

Steps For Long Multiplication

First line up the numbers vertically and match the places from the right like this.

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}21}\\\end{array}$$

Now multiply the first number with the 1^{st} digit in 2^{nd} number to get intermediate results. That is Multiply 45 with 1. Write the result 45 at the end leaving 0 spaces to the right like this.

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}21}\\\phantom{\times9}45\\\end{array}$$

Now multiply the first number with the 2^{nd} digit in 2^{nd} number to get intermediate results. That is Multiply 45 with 2. Write the result 90 at the end leaving 1 spaces to the right like this.

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}21}\\\phantom{\times9}45\\\underline{\phantom{\times}90\phantom{9}}\\\end{array}$$

Now add the intermediate results to get final answer.

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}21}\\\phantom{\times9}45\\\underline{\phantom{\times}90\phantom{9}}\\\phantom{\times}945\end{array}$$

Factor

$$3^{3}\times 5\times 7$$