A base angle of an isosceles triangle is (1/3) of the apex angle. What is the degree of the apex angle?
等腰三角形的一个底角度数是顶角度数的(1/3)，顶角的度数为多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 2</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">180 / (5/3)</gadget>
<output>108</output>

<result>108</result>