The toy factory processed 210 cars in 3 days. If this continues, how many cars can be processed in 7 days?
玩具厂3天加工了210辆小汽车，照这样做下去，7天能加工多少辆．
<gadget id="calculator">210 / 3</gadget>
<output>70</output>

<gadget id="calculator">70 * 7</gadget>
<output>490</output>

<result>490</result>