Mr. Wang goes to the sporting goods store to buy balls for athletes. With the money he brings, if he buys all footballs, he can buy 12; How much money can you buy basketball
王老师去体育用品商店给运动员购买球，他所带的钱，如果全部买足球，可以买12个；如果全部买篮球，可以买15个，结果王老师买了4个足球，那么剩下的钱还可以买篮球多少个
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 4</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(2/3) / (1/15)</gadget>
<output>10</output>

<result>10</result>