Explain how to find the perfect square of XXXXXXXXXXwithout using a calculator, step by step.

Explain how to find the perfect square of 329476 without using a calculator, step by step.
574
5 32 94 76
5 25
107 7 94
7 7 49
1144 45 76
4 45 76
1128 xx xx
Explanation of the process:
Step 1: Group in pair starting from ending. Here 76, then 94 and lastly 32.
Note: If you are left with only one digit in the end then don’t worry. Place as it is. You can also think
of placing 0 before that.( Does that matter??) Obviously...