The road distance between A and B is 804 kilometers. A truck and a car start from the two places at the same time and drive toward each other. 100 kilometers per hour, how many kilometers per hour does the truck travel on average?
甲乙两地之间的公路路程是804千米，一辆货车和一辆轿车同时从两地出发，相向而行，途中货车停车修理了1.2小时，结果轿车经过5小时与货车相遇，轿车平均每小时行100千米，货车平均每小时行多少千米？
<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<gadget id="calculator">804 - 500</gadget>
<output>304</output>

<gadget id="calculator">5 - 1.2</gadget>
<output>3.8</output>

<gadget id="calculator">304 / 3.8</gadget>
<output>80</output>

<result>80</result>