It takes 9 hours for a truck to travel from point A to point B, and a passenger car travels from point B to point A faster than the truck by 5 kilometers per hour. The two cars are traveling towards each other at the same time. After walking for 4 hours, the distance between the two cars is still 20 kilometers. How many kilometers is the distance between the two places?
一辆货车从甲地到乙地要9小时，一辆客车从乙地到甲地，每小时比货车快5千米，两车同时相向而行，走了4小时，两车还相距20千米，两地相距多少千米？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<gadget id="calculator">1 * 40 * 9</gadget>
<output>360</output>

<result>360</result>