Given the following shapes: a right_triangle with base 9 and height 8, a right_triangle with base 1 and height 3, a right_triangle with base 4 and height 1. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 9 and height 8: Area = 0.5 x 9 x 8 = 36.0
Right triangle with base 1 and height 3: Area = 0.5 x 1 x 3 = 1.5
Right triangle with base 4 and height 1: Area = 0.5 x 4 x 1 = 2.0</think>

<answer>40</answer>