# Multiply a number by 4

#### by Ramya[ Edit ] 2009-11-10 08:30:35

**Multiply a number by 4:**
It may be easy to multiply a number by 4 using the tables. But for a long integer it would be difficult to multiply it by 4.

Hence we need a calculator to perform the task.

So use this shortcut to multiply by 4.

*** Multiply the number by 2.**

* Again double it you will get the answer.
For example,

if you want to multiply 16 by 4.

* first double the number by 2(16*2=32)

* again double it by 2(32*2=64)

That's it.. you got the result......