The ratio of the angles in a triangle is 3:4:2, what is the smallest angle?
一个三角形内角度数之比为3：4：2，最小的一个角为多少．
<gadget id="calculator">3 + 4 + 2</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">180 * (2/9)</gadget>
<output>40</output>

<result>40</result>