For multiplying quickly First you have to follow the steps given below:
step 1: In two digit no first you have to multiply the unit place digits.
step 2: multiply the unit place digit with 10th pace and the 10th place digit with unit place digit in cross manner.
step 3:Add the both multiplied values.
step 4:multiply the 10th place values with each other.
Let's see an example for better clarification.