Two trains, A and B, depart from two stations at the same time. The speed of A train is 78 km/h, and the speed of B train is 96 km/h. When they meet, A travels 72 km less than B train. How many kilometers apart?
甲乙两列火车同时从两站相对开出，甲车的速度是78千米/时，乙车的速度是96千米/时，相遇时甲车比乙车少行了72千米，两站相距多少千米？
<gadget id="calculator">96 - 78</gadget>
<output>18</output>

<gadget id="calculator">72 / 18</gadget>
<output>4</output>

<gadget id="calculator">96 + 78</gadget>
<output>174</output>

<gadget id="calculator">4 * 174</gadget>
<output>696</output>

<result>696</result>