In a right triangle, the smaller acute angle is (2/3) of the larger acute angle. What is the larger acute angle?
在直角三角形中，较小锐角是较大锐角的(2/3)，较大锐角是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

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

<result>54</result>