There are 30 basketballs in the store, the number of footballs is basketball (2/5) and volleyball (3/4), how many volleyballs are there?
商店有篮球30个，足球的个数是篮球的(2/5)同时又是排球的(3/4)，排球有多少个？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) / (3/4)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">30 * (8/15)</gadget>
<output>16</output>

<result>16</result>