The east and west villages are 5.5 kilometers apart. A and B travel from the east village to the west village. A travels 75 meters per minute, and B travels 100 meters per minute. A walks for 10 minutes before B starts. When B catches up with A, how many kilometers are there from West Village?
东、西两村相距5.5千米，甲、乙两人由东村去西村，甲每分钟行75米，乙每分钟行100米，甲走了10分钟后乙才出发．乙追上甲时距离西村还有多少千米？
<gadget id="calculator">5.5 * 1_000</gadget>
<output>5_500</output>

<gadget id="calculator">100 - 75</gadget>
<output>25</output>

<gadget id="calculator">10 / 25</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">100 * 75 * (2/5)</gadget>
<output>3_000</output>

<gadget id="calculator">5_500 - 3_000</gadget>
<output>2_500</output>

<gadget id="calculator">2_500 / 1_000</gadget>
<output>5/2 = around 2.5</output>

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