Find square of two digit numbers

Find the square of 20. We get the answer as

	4	0	0	Step - 1 :: Square of first digit (22 = 4) then                  Multiply with 100 (4*100=400)
+		0	0	Step - 2 :: Multiply 2 with first & second digit (2*0*2=0)  then       Multiply with 10 (0*10=00)
+			0	Step - 3 :: Square of second digit (02 = 0)
	4	0	0	Finally we get answer (202 = 400)

Find the square of 84. We get the answer as

	6	4	0	0	Step - 1 :: Square of first digit (82 = 64) then                 Multiply with 100 (64*100=6400)
+		6	4	0	Step - 2 :: Multiply 2 with first & second digit (8*4*2=64) then        Multiply with 10 (64*10=640)
+			1	6	Step - 3 :: Square of second digit (42 = 16)
	7	0	5	6	Finally we get answer (842 = 7056)

Find the square of 99. We get the answer as

	8	1	0	0	92 = 81*100 = 8100
+	1	6	2	0	9*9*2 = 162*10 = 1620
+			8	1	92 = 81
	9	8	0	1	Finally 992 = 9801

It is important to put proper digit in proper position.

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