No. 4 bus departs every 5 minutes, No. 22 bus departs every 6 minutes, and No. 28 bus departs every 8 minutes. Now these three buses depart from the starting point at the same time. At least how many minutes later? The three road cars departed at the same time.
4路车每隔5分钟发一次车，22路车每隔6分钟发一次车，28路车每隔8分钟发一次车，现在这三路公共汽车同时从起点发车，至少再过多少分钟这三路车又同时发车．
<gadget id="calculator">2 * 2 * 2 * 3 * 5</gadget>
<output>120</output>

<result>120</result>