The ratio of degrees of the three interior angles of a triangle is 2:1:2, what is the smallest angle in this triangle?
一个三角形三个内角的度数比是2：1：2，这个三角形中最小的角是多少度．
<gadget id="calculator">2 + 1 + 2</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">180 * (1/5)</gadget>
<output>36</output>

<result>36</result>