The three brothers set off from home on the same day to go up the mountain to collect herbs. The eldest comes back every 10 days, the second child comes back every 8 days, and the third child comes back every 6 days. How many days will it take for the three brothers to come back at the same time?
兄弟三人同一天从家出发上山去采药，老大10天回来一次，老二8天回来一次，老三6天回来一次，兄弟三人至少需要多少天后能同时回来？
<gadget id="calculator">2 * 2 * 2 * 3 * 5</gadget>
<output>120</output>

<result>120</result>