Lets say, we want to calculate the square of 608. The entire steps are illustrated in the following figure.
Steps for better understand:
Step 1: On Base 600, given number 608 is 8 more than 600. Add 8 and 608, the result is 616.
Step 2: Multiply 616 with base 6. The result is 3696. This is the 1st part of the answer. Which is left side part.
Step 3: Find the square of 8, the result is 64. This is the 2nd part of the answer.
The final answer is 369664
More examples to understand: