Roses are watered every 6 days, orchids are watered on the 8th day, and prickly pears are watered every 30 days. The gardener watered the three plants today. How many days will it take to water the three plants at the same time?
玫瑰花每6天浇一次水，兰花第8天浇一次水，仙人球30天才浇一次水，花匠今天给三种植物浇了水，至少要过多少天后才能给这三种花同时浇水？
<gadget id="calculator">2 * 2 * 2 * 3 * 5</gadget>
<output>120</output>

<result>120</result>