Given the following shapes: a rectangle with width 2 and height 4, a square with side 1, a right_triangle with base 3 and height 6. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Rectangle with width 2 and height 4: Area = 2 x 4 = 8
Square with side 1: Area = 1^2 = 1
Right triangle with base 3 and height 6: Area = 0.5 x 3 x 6 = 9.0</think>

<answer>18</answer>