There are 9 rows of cars parked in the parking lot of the car factory, each row has 30 cars. How many cars are parked in this parking lot?
汽车制造厂的停车场停了9排汽车，每排有30辆．这个停车场停了多少辆汽车？
<gadget id="calculator">30 * 9</gadget>
<output>270</output>

<result>270</result>