Two cars, a passenger car and a truck, leave the gas station in opposite directions at the same time. It is known that the speed of the passenger car is 75 kilometers per hour, and the speed of the truck is 65 kilometers per hour. After 5.2 hours, how many kilometers are there between the two cars?
客车、货车两辆车同时从加油站向相反的方向开出．已知客车的速度是每小时75千米，货车的速度是每小时65千米，5.2小时后，两车相距多少千米？
<gadget id="calculator">75 + 65</gadget>
<output>140</output>

<gadget id="calculator">140 * 5.2</gadget>
<output>728</output>

<result>728</result>