What is the square of 0·02?

To find the square of 0.02, multiply it by itself: 0.02 × 0.02.

First, multiply the digits: 2 × 2 = 4.

Count the total decimal places: 0.02 has two, and the second 0.02 has two, totaling four decimal places.

Place the decimal point so there are four digits after it: 0.0004.