MATHS TRICK FOR 12

MATHS TRICK:
Multiply any large number by 12 mentally in seconds. To multiply any number by 12, just double the last digit& thereafter double each digit and add it to its neighbour.
EX: 21314 * 12 =  255768.
Lets break it into simple steps:

Step 1: 021314 * 12 =  _____8.
(Double of Last Digit 4= 8 ).

Step 2: 021314 * 12 =  ____68.
(Now Double 1= 2, and add it to 4, 2+4=6).

Step 3: 021314 * 12=   ___768.
(Now Double 3=6, and add it to 1, 6+1=7).

Step 4: 021314 * 12=   __5768.
(Now Double 1=2, and add it to 3, 2+3=5).

Step 5: 021314 * 12=   _55768.
(Now Double  2=4, and add it to 1, 4+1=5).

Step 6: 021314 * 12=   255768.
(Now Double 0=0, and add it to 2, 0+2=2).

So your final answer of 21314*12 = 255768.

MSG BY: DEEPAK.S.G(GKLIGHTS).

SOURCE: GATHERED FROM 'MATHS TRICKS WEBSITES'.