A and B start from point A at the same time and walk along a 400-meter circular runway. A walks 80 meters per minute, and B walks 50 meters per minute. So, how many minutes will it take for these two people to meet at point A again?
甲和乙同时从A点背向出发沿400米环行跑道行走，甲每分钟走80米，乙每分钟走50米．那么，这两人最少用多少分钟再会在A点相遇．
<gadget id="calculator">400 / 80</gadget>
<output>5</output>

<gadget id="calculator">400 / 50</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<result>40</result>