The gymnasium bought a batch of small balls, 3 3s, 4 4s, 5 5s were distributed exactly every time, and there was nothing left. How many balls are there at least in this batch?
体育室买来一批小皮球，3个3个、4个4个、5个5个的分每次都正好分完，没有剩余．这批皮球至少有几个？
<gadget id="calculator">3 * 4 * 5</gadget>
<output>60</output>

<result>60</result>