Solve 840*15

$$840 \times 15$$

Evaluate

$$12600$$

Steps For Long Multiplication

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

$$\begin{array}{c}\phantom{\times99}840\\\underline{\times\phantom{999}15}\\\end{array}$$

Now multiply the first number with the 1^{st} digit in 2^{nd} number to get intermediate results. That is Multiply 840 with 5. Write the result 4200 at the end leaving 0 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}840\\\underline{\times\phantom{999}15}\\\phantom{\times9}4200\\\end{array}$$

Now multiply the first number with the 2^{nd} digit in 2^{nd} number to get intermediate results. That is Multiply 840 with 1. Write the result 840 at the end leaving 1 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}840\\\underline{\times\phantom{999}15}\\\phantom{\times9}4200\\\underline{\phantom{\times9}840\phantom{9}}\\\end{array}$$

Now add the intermediate results to get final answer.

$$\begin{array}{c}\phantom{\times99}840\\\underline{\times\phantom{999}15}\\\phantom{\times9}4200\\\underline{\phantom{\times9}840\phantom{9}}\\\phantom{\times}12600\end{array}$$

Factor

$$2^{3}\times 3^{2}\times 5^{2}\times 7$$