In a right triangle, the larger acute angle is twice the smaller acute angle, what is the smaller acute angle?
在一个直角三角形中，较大锐角是较小锐角的2倍，较小的锐角是多少度？
<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>