A passenger car and a truck drive from A to B at the same time. After 10 hours, the passenger car falls behind the truck by 80 kilometers. The bus travels 45 kilometers per hour. How many kilometers per hour does the truck travel?
客车和货车同时从甲地开往乙地，经过10小时后，客车落在货车后面80千米，客车每小时行45千米，货车每小时行多少千米？
<gadget id="calculator">45 * 10</gadget>
<output>450</output>

<gadget id="calculator">450 + 80</gadget>
<output>530</output>

<gadget id="calculator">530 / 10</gadget>
<output>53</output>

<result>53</result>