This is a short way of multiplying 25*5

First, you multiply number 5 with the last digit i.e 5. So you get 25 then you put the last no. 5 and add the remaining 2 after multiplying 5*2..

1) 5*5=25
put only 5
then add the 10+2=12
so we get 125.... 
1 5 1
nice,this is applicable for two numbers i.e 25*25
we already know that 25*25=625
not like that if we take multiplication of two numbers i.e 67*86,actually it takes some time na at that time we required some shortcut na i asked that.thats are simple.
of we wnat shortcut we need 2 learn abacus