Solve 642*20

$$642 \times 20$$

Evaluate

$$12840$$

Steps For Long Multiplication

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

$$\begin{array}{c}\phantom{\times99}642\\\underline{\times\phantom{999}20}\\\end{array}$$

Now multiply the first number with the 1^{st} digit in 2^{nd} number to get intermediate results. That is Multiply 642 with 0. Write the result 0 at the end leaving 0 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}642\\\underline{\times\phantom{999}20}\\\phantom{\times99999}0\\\end{array}$$

Now multiply the first number with the 2^{nd} digit in 2^{nd} number to get intermediate results. That is Multiply 642 with 2. Write the result 1284 at the end leaving 1 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}642\\\underline{\times\phantom{999}20}\\\phantom{\times99999}0\\\underline{\phantom{\times}1284\phantom{9}}\\\end{array}$$

Now add the intermediate results to get final answer.

$$\begin{array}{c}\phantom{\times99}642\\\underline{\times\phantom{999}20}\\\phantom{\times99999}0\\\underline{\phantom{\times}1284\phantom{9}}\\\phantom{\times}12840\end{array}$$

Factor

$$2^{3}\times 3\times 5\times 107$$