If a right angle is divided into two acute angles, if one acute angle is twice the other acute angle, what is the smaller acute angle in degrees?
把一个直角分成两个锐角，如果一个锐角是另一个锐角的2倍，那么小的锐角是多少°
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">90 / 3</gadget>
<output>30</output>

<result>30</result>