On a highway, a car drives from city A to city B at a speed of 50 km/h. At the same time, two people, A and B, are riding bicycles in city B. The speed is the same, if A meets a car after driving 3 kilometers, and then the car drives for another 12 minutes before catching up with B, how many kilometers are the distance between A and B?
在一条公路上，汽车以50千米/时的速度从A城向B城开出，同时在B城有甲、乙两人骑自行车，分别与汽车相向和同向行进，且甲、乙的速度相同，若甲行驶了3千米后恰与汽车相遇，此后汽车又行驶了12分钟才追上乙，则A、B两城相距多少千米．
<gadget id="calculator">12 / 60</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">50 * (1/5)</gadget>
<output>10</output>

<gadget id="calculator">10 - 3 - 3</gadget>
<output>4</output>

<gadget id="calculator">4 / (1/5)</gadget>
<output>20</output>

<gadget id="calculator">50 + 20</gadget>
<output>70</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">70 * (3/20)</gadget>
<output>21/2 = around 10.5</output>

<result>21/2 = around 10.5</result>