In a right triangle, the ratio of the two acute angles is 2:3, where the larger acute angle is smaller than the smaller acute angle.
一个直角三角形中，两个锐角度数比是2：3，其中较大的锐角比较小的锐角多少度．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">90 * (3/5)</gadget>
<output>54</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">90 * (2/5)</gadget>
<output>36</output>

<gadget id="calculator">54 - 36</gadget>
<output>18</output>

<result>18</result>