The school cafeteria shipped 80 bags of rice and 80 bags of flour each. Rice was 75kg in each bag, and flour was 25kg in each bag. How much less was flour than rice?
学校食堂运来大米和面粉各80袋，大米每袋75kg，面粉每袋25kg，面粉比大米少多少千克？
<gadget id="calculator">75 - 25</gadget>
<output>50</output>

<gadget id="calculator">50 * 80</gadget>
<output>4_000</output>

<result>4_000</result>