Given the following shapes: a right_triangle with base 5 and height 1, a right_triangle with base 1 and height 4, a trapezoid with bases 1 and 7 and height 6, a rectangle with width 7 and height 2. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 5 and height 1: Area = 0.5 x 5 x 1 = 2.5
Right triangle with base 1 and height 4: Area = 0.5 x 1 x 4 = 2.0
Trapezoid with bases 1, 7 and height 6: Area = 0.5 x (1 + 7) x 6 = 24.0
Rectangle with width 7 and height 2: Area = 7 x 2 = 14</think>

<answer>42</answer>