A passenger train departs from Station A at a speed of 120 km per hour and can reach Station B in 2 hours, and a freight train departs from Station B to reach Station A in 4 hours. If two cars are going towards each other from two stations A and B at the same time, how many hours later will the two cars meet?
一列客车以每小时120km的速度从甲站出发，2小时可到达乙站，有一列货车从乙站开出4小时可到达甲站．如果两车同时从甲乙两站相向而行，几小时后两车相遇？
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">120 * (1/2)</gadget>
<output>60</output>

<gadget id="calculator">60 + 120</gadget>
<output>180</output>

<gadget id="calculator">2 / 180</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">120 * (1/90)</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>