The supermarket shipped 212 bags of rice. The number of bags of flour is twice that of rice. How many bags of flour are there?
超市运来212袋大米，面粉的袋数是大米的2倍，面粉有多少袋．
<gadget id="calculator">212 * 2</gadget>
<output>424</output>

<result>424</result>