In a right triangle, the ratio of the degrees of the two acute angles is 1:2, what is the smallest acute angle?
一个直角三角形，两个锐角的度数比是1：2，最小的一个锐角是多少°．
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">90 * (1/3)</gadget>
<output>30</output>

<result>30</result>