The speeds of two cars A and B are respectively 52 kilometers per hour and 40 kilometers per hour. The two cars start from point A to point B at the same time. After 6 hours of departure, car A encounters an oncoming truck ． After another hour, car B also met the truck. Ask: What is the speed of this truck?
甲、乙两辆汽车的速度分别为每小时52千米和每小时40千米，两车同时从A地出发到B地去，出发6小时后，甲车遇到一辆迎面开来的卡车．又过了1小时，乙车也遇到了这辆卡车．请问：这辆卡车的速度是多少？
<gadget id="calculator">52 * 6</gadget>
<output>312</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">40 * 7</gadget>
<output>280</output>

<gadget id="calculator">312 - 280</gadget>
<output>32</output>

<gadget id="calculator">7 - 6</gadget>
<output>1</output>

<gadget id="calculator">32 / 1</gadget>
<output>32</output>

<result>32</result>