Given the following shapes: a right_triangle with base 7 and height 3, a right_triangle with base 3 and height 5, a right_triangle with base 6 and height 2, a right_triangle with base 6 and height 4, a right_triangle with base 2 and height 4. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 7 and height 3: Area = 0.5 x 7 x 3 = 10.5
Right triangle with base 3 and height 5: Area = 0.5 x 3 x 5 = 7.5
Right triangle with base 6 and height 2: Area = 0.5 x 6 x 2 = 6.0
Right triangle with base 6 and height 4: Area = 0.5 x 6 x 4 = 12.0
Right triangle with base 2 and height 4: Area = 0.5 x 2 x 4 = 4.0</think>

<answer>40</answer>