A circular runway with a length of 800 meters, A and B practice cycling, A travels 560 meters per minute, B's speed is 3/7 of A's (3/7), the two start from the same place and the same direction at the same time, how many minutes have passed? Can we meet?
一条长为800米的环形跑道，甲乙两人练习骑自行车，甲每分钟行560米，乙的速度是甲的(3/7)，两人同时从同地同向出发，经过多少分钟两人可以相遇？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">560 * (3/7)</gadget>
<output>240</output>

<gadget id="calculator">560 - 240</gadget>
<output>320</output>

<gadget id="calculator">800 / 320</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>