The distance between A and B is 420 kilometers. A train of passenger cars and a train of trucks leave opposite cities at the same time and meet each other in 4 hours. It is known that the speed of the truck is (3/4) that of the passenger train. The passenger train travels more than one thousand per hour. rice?
甲、乙两城相距420千米，一列客车和一列货车同时从甲、乙两城相对开出，4小时相遇，已知货车的速度是客车的(3/4)，客车每小时行多千米？
<gadget id="calculator">420 / 4</gadget>
<output>105</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">105 * (4/7)</gadget>
<output>60</output>

<result>60</result>