A and B set off on foot at the same time at the same place and in the same direction at a speed of 60 meters per minute. After 15 minutes, A returns to the original place to pick up things, and B continues to move forward. It takes 5 minutes for A to get things, and then rides a bicycle at 360 meters per minute. How many minutes does it take for A to catch up with B?
甲、乙两人以每分钟60米的速度同时同地同向步行出发，15分钟后，甲返回原地取东西，乙继续前进，甲取东西用去5分钟，然后骑自行车以每分钟360米的速度去追乙，甲骑车多少分钟才能追上乙．
<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">30 + 5</gadget>
<output>35</output>

<gadget id="calculator">360 - 60</gadget>
<output>300</output>

<gadget id="calculator">35 / 300</gadget>
<output>7/60 = around 0.116667</output>

<gadget id="calculator">60 * (7/60)</gadget>
<output>7</output>

<result>7</result>