Solve 45*20=

$$45 \times 20 =$$

Evaluate

$$900$$

Steps For Long Multiplication

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

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}20}\\\end{array}$$

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

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}20}\\\phantom{\times999}0\\\end{array}$$

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.

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}20}\\\phantom{\times999}0\\\underline{\phantom{\times}90\phantom{9}}\\\end{array}$$

Now add the intermediate results to get final answer.

$$\begin{array}{c}\phantom{\times9}45\\\underline{\times\phantom{9}20}\\\phantom{\times999}0\\\underline{\phantom{\times}90\phantom{9}}\\\phantom{\times}900\end{array}$$

Factor

$$2^{2}\times 3^{2}\times 5^{2}$$