The grain store shipped 320 kg of flour, and the amount of rice shipped was 4 times that of the flour. How many kilograms more rice was shipped than the flour?
粮店运来面粉320千克，运来的大米是面粉的4倍，运来的大米比面粉多多少千克？
<gadget id="calculator">320 * 4</gadget>
<output>1_280</output>

<gadget id="calculator">1_280 - 320</gadget>
<output>960</output>

<result>960</result>