Given the following shapes: a right_triangle with base 4 and height 2, a rectangle with width 3 and height 1, a rectangle with width 3 and height 8, a trapezoid with bases 3 and 1 and height 3. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 4 and height 2: Area = 0.5 x 4 x 2 = 4.0
Rectangle with width 3 and height 1: Area = 3 x 1 = 3
Rectangle with width 3 and height 8: Area = 3 x 8 = 24
Trapezoid with bases 3, 1 and height 3: Area = 0.5 x (3 + 1) x 3 = 6.0</think>

<answer>37</answer>