The distance between A and B is 120 kilometers. The bus and the truck start from the two places at the same time and travel in the same direction. After 5 hours, the truck catches up with the bus. It is known that the bus travels 100 kilometers per hour. How many kilometers does the truck travel per hour?
甲乙两地相距120千米，客车和货车从两地同时出发、同向而行，5小时后货车追上客车，已知客车每小时行100千米，求货车每小时行多少千米？
<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<gadget id="calculator">500 + 120</gadget>
<output>620</output>

<gadget id="calculator">620 / 5</gadget>
<output>124</output>

<result>124</result>