The grain store shipped 471 bags of flour, 21 bags more than 4.5 times that of rice. How many bags of rice are shipped?
粮店运进面粉471袋，比大米的4.5倍还多21袋．运来大米多少袋？
<gadget id="calculator">471 - 21</gadget>
<output>450</output>

<gadget id="calculator">450 / 4.5</gadget>
<output>100</output>

<result>100</result>