car shop bought 570 cars, sold 238 cars in one month, and then bought another 168 cars. How many cars are still unsold?
某汽车店购进570台汽车，经过1个月卖出238台，后来又进了168台，请问现在还有多少台没有卖？
<gadget id="calculator">168 - 238</gadget>
<output>-70</output>

<gadget id="calculator">570 + (-70)</gadget>
<output>500</output>

<result>500</result>