For a simple fraction, multiply its numerator by 3 and divide the denominator by 2. The result is (9/2). What is the original fraction?
一个最简分数，把它的分子乘3，分母除以2，结果是(9/2)，原分数是多少．
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>