The distance between A and B is 460 kilometers. A passenger car and a truck start from A and B at the same time and drive toward each other. The bus travels 180 kilometers in 3 hours, and the truck travels 110 kilometers in 2 hours. After how many hours did the two cars meet? How many miles did the bus travel farther than the truck when they met?
甲乙两地相距460千米，客车和货车同时从甲、乙两地出发，相向而行．客车3小时行了180千米，货车2小时行了110千米．经过几小时两车相遇？相遇时客车比货车多行多少千米？
<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<gadget id="calculator">110 / 2</gadget>
<output>55</output>

<gadget id="calculator">60 + 55</gadget>
<output>115</output>

<gadget id="calculator">460 / 115</gadget>
<output>4</output>

<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<gadget id="calculator">55 * 4</gadget>
<output>220</output>

<gadget id="calculator">240 - 220</gadget>
<output>20</output>

<result>20</result>