The highway from A to B is about 440 kilometers long. A car and a passenger car start from the two places at the same time and drive towards each other. The car travels 120 kilometers per hour, and the passenger car travels 100 kilometers per hour. How long does it take for the two cars to meet?
甲地到乙地的高速公路大约长440千米，一辆轿车和一辆客车同时两地出发相向而行．轿车每小时行驶120千米，客车每小时行驶100千米两车经过几小时后相遇？
<gadget id="calculator">120 + 100</gadget>
<output>220</output>

<gadget id="calculator">440 / 220</gadget>
<output>2</output>

<result>2</result>