Problem
Find the area of a square with side length of 7cm.
Solution
Step 1 ：The formula to calculate the area of a square is \(A = s^2\), where \(s\) is the length of a side of the square.
Step 2 ：Substitute \(s = 7\) cm into the formula. So, we get \(A = (7)^2\).
Step 3 ：Calculate the value of \(A\). So, we get \(A = 49\) sq.cm.
