A car, a motorcycle, and a bicycle start from the same place at the same time and chase a pedestrian in front along the same road. The three vehicles take 10 minutes, 15 minutes, and 60 minutes to catch up with the pedestrian. If a car travels 1000 meters per minute and a motorcycle travels 700 meters per minute, how many meters per minute does the bicycle travel?
一辆汽车、一辆摩托车和一辆自行车同时从同一地点出发，沿同一公路追赶前面一个步行的人，这三辆车分别用10分钟、15分钟和60分钟追上步行的人，已知汽车每分钟行1000米，摩托车每分钟行700米，那么自行车每分钟行多少米．
<gadget id="calculator">15 * 700</gadget>
<output>10_500</output>

<gadget id="calculator">10 * 1_000</gadget>
<output>10_000</output>

<gadget id="calculator">10_500 - 10_000</gadget>
<output>500</output>

<gadget id="calculator">15 - 10</gadget>
<output>5</output>

<gadget id="calculator">500 / 5</gadget>
<output>100</output>

<gadget id="calculator">100 * 60</gadget>
<output>6_000</output>

<gadget id="calculator">100 * 10</gadget>
<output>1_000</output>

<gadget id="calculator">10_000 - 1_000</gadget>
<output>9_000</output>

<gadget id="calculator">6_000 + 9_000</gadget>
<output>15_000</output>

<gadget id="calculator">15_000 / 60</gadget>
<output>250</output>

<result>250</result>