Two buses, A and B, depart from Fuyang to Shanghai at the same time. The whole journey is 240 meters. The speed of bus A is 60 km/h, and the speed of bus B is 40 km/h. When bus A completes the journey, bus B leaves Shanghai. How far is it?
甲乙两辆公交车同时从富阳出发去上海，全程240米，甲车的速度是60千米/时，乙车的速度是40千米/时，当甲车行完全程时，乙车离上海还有多远？
<gadget id="calculator">240 / 60</gadget>
<output>4</output>

<gadget id="calculator">4 * 40</gadget>
<output>160</output>

<gadget id="calculator">240 - 160</gadget>
<output>80</output>

<result>80</result>