circular runway is 500 meters long. A and B start from the same point and direction at the same time. A travels 120 meters in each branch, and B travels 100 meters in each branch. Both of them take a rest for 1 minute for each 200 meters. How many minutes does A pass the first time? Catch up with B?
一个环形跑道长500米，甲乙两人同时从同一点同向出发，甲每分行120米，乙每分行100米，两人都是每行200米就休息1分，甲经多少分第一次追上乙？
<gadget id="calculator">100 * 2</gadget>
<output>200</output>

<gadget id="calculator">500 + 200</gadget>
<output>700</output>

<gadget id="calculator">120 - 100</gadget>
<output>20</output>

<gadget id="calculator">700 / 20</gadget>
<output>35</output>

<result>35</result>