The kindergarten spent 180 yuan to buy 5 balls for the first time. According to this calculation, the second time will cost 72 yuan more. How many balls can you buy in total?
幼儿园第一次花了180元钱买了5个皮球，照这样计算，第二次再多花72元钱，一共可以买几个皮球？
<gadget id="calculator">180 / 5</gadget>
<output>36</output>

<gadget id="calculator">72 / 36</gadget>
<output>2</output>

<gadget id="calculator">5 + 2 + 5</gadget>
<output>12</output>

<result>12</result>