The distance between A and B is 90 kilometers. A rides a bicycle and travels 15 kilometers per hour, and B drives a car. It takes 3 minutes less than A for each 1 kilometer. A and B start from A to B at the same time. Return immediately after arriving at B. When B meets A, how many kilometers away are they from B?
A、B两地相距90千米，甲骑自行车每小时行15千米，乙开汽车，每行1千米比甲少用3分钟，甲、乙两人同时从A出发去B地，乙到B地后立即返回，当乙遇到甲时，他们距离B地多少千米？
<gadget id="calculator">60 / 15</gadget>
<output>4</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 * 60</gadget>
<output>60</output>

<gadget id="calculator">15 + 60</gadget>
<output>75</output>

<gadget id="calculator">2 / 75</gadget>
<output>2/75 = around 0.026667</output>

<gadget id="calculator">15 * 90 * (2/75)</gadget>
<output>36</output>

<gadget id="calculator">90 - 36</gadget>
<output>54</output>

<result>54</result>