A belongs to B (2/3) and at the same time belongs to C (4/5). C is 60, how much is B.
甲是乙的(2/3)，同时又是丙的(4/5)，丙是60，乙是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(4/5) / (2/3)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">60 * (6/5)</gadget>
<output>72</output>

<result>72</result>