Given the following shapes: a right_triangle with base 4 and height 6, a right_triangle with base 7 and height 6, a right_triangle with base 6 and height 6. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 4 and height 6: Area = 0.5 x 4 x 6 = 12.0
Right triangle with base 7 and height 6: Area = 0.5 x 7 x 6 = 21.0
Right triangle with base 6 and height 6: Area = 0.5 x 6 x 6 = 18.0</think>

<answer>51</answer>