If the ratio of the three interior angles to the degrees of a triangle is 2:3:5, what is the smallest angle of the triangle?
如果一个三角形三个内角和度数比是2：3：5，那么这个三角形最小的角是多少度．
<gadget id="calculator">2 + 3 + 5</gadget>
<output>10</output>

<gadget id="calculator">180 / 10</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<result>36</result>