Given the following shapes: a square with side 3, a right_triangle with base 4 and height 7, a right_triangle with base 3 and height 2, a trapezoid with bases 3 and 7 and height 1. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Square with side 3: Area = 3^2 = 9
Right triangle with base 4 and height 7: Area = 0.5 x 4 x 7 = 14.0
Right triangle with base 3 and height 2: Area = 0.5 x 3 x 2 = 3.0
Trapezoid with bases 3, 7 and height 1: Area = 0.5 x (3 + 7) x 1 = 5.0</think>

<answer>31</answer>