How to find a square of a number.

When a number is multiplied by itself, the product so obtained is known as the square of that number.
FOR EXAMPLE,
  1.  22 = 2 * 2 = 4
  2. 32 = 3 * 3 = 9
  3. 42 = 4 * 4 = 16
  4. 52 = 5 * 5 = 25  and so on. 
We say that square of 1 is 1, square of 2 is 4, square of 3 is 9, square of 4 is 16 and so on. Thus, the square of a number is the number itself raised to the power 2.         

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