Two brothers run in the same direction at the same time from the same starting point on a 200-meter-long circular track. It is known that the younger brother runs 120 meters per minute, and the older brother runs 140 meters per minute. After a few minutes, the older brother catches up with the younger brother?
兄弟二人从200米长的环形跑道同一起点同时同向跑步，已知弟弟每分钟跑120米，哥哥每分钟跑140米，几分钟后哥哥追上弟弟？
<gadget id="calculator">140 - 120</gadget>
<output>20</output>

<gadget id="calculator">200 / 20</gadget>
<output>10</output>

<result>10</result>