The grain store brings in 20 bags of rice and 20 bags of flour, each bag of rice is 90 kilograms, and each bag of flour is 25 kilograms. How many kilograms more rice is shipped than flour.
粮店运进大米、面粉各20袋，每袋大米90千克，每袋面粉25千克，运进的大米比面粉多多少千克．
<gadget id="calculator">20 * 90</gadget>
<output>1_800</output>

<gadget id="calculator">20 * 25</gadget>
<output>500</output>

<gadget id="calculator">1_800 - 500</gadget>
<output>1_300</output>

<result>1_300</result>