Square between 26 to 49

In order to find square between 26 to 49. You should know square of numbers from 1 to 25.
Consider example as Square of 32

1. Subtract 25 from 32 difference is 7.
2. Multiply 7 with 100 i.e. 700
3. Subtract 7 from 25. i.e. 18
4. Find Square of 18 i.e. 324
5. Add the value of step 2 and step 4. (700+324=1024)
6. Square of 32 = 1024