"Shuangdongfang" is the starting point of buses No. 5, No. 15, and No. 333. No. 5 bus departs every 5 minutes, No. 15 departs every 6 minutes, and No. 333 departs every 20 minutes. After the start, at least how many minutes later will the start start at the same time?
"双东坊"是5路、15路、333路汽车的起点站，5路车每隔5分钟发车一次，15路每隔6分钟发车一次，333路每隔20分钟发车一次，这三路车同时发车后，至少再过多少分后又同时发车？
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<result>60</result>