Let me explain it to you with an example. Suppose we want to calculate (1.089)^1.2 Step-1 : P ut down the base (1.089) in your calculator and now press the √ (Square root) key 12 times. (In our example we will get 1.0000208156) Step-2 : N ow subtract 1 from the number we get in step 1. (In our example we will get 1. 0000208156 -1= 0000208156) Step-3 : N ow multiply the number in step 2 with the power 'n' (In our example 1.2, 0000208156 X 1.2 = 0.00002497872) Step-4 : Add back one to the number we get in step 3 (In continuation of our example, the no we get is 1. 00002497872 ) Step-5 : In the final step press "X =" keys ('Multiplication' and 'Equal To' keys one after the other) 12 times (Our answer is 1. 00002497872 X=, X=, X=......... 12 times, we will get 1.10772851898 says 1.1077) Practice it a few times before the exams.