A fraction whose numerator is 3 and whose denominator is twice the numerator, what is the fraction?
一个分数，它的分子是3，分母是分子的2倍，这个分数是多少．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>