The grain store shipped 40 bags of rice and 40 bags of flour each. Rice was 50 kilograms per bag and flour was 25 kilograms per bag. How many kilograms of rice and flour were shipped in total?
粮店运来大米、面粉各40袋，大米每袋50千克，面粉每袋25千克，运来的大米、面粉共多少千克？
<gadget id="calculator">40 * 50</gadget>
<output>2_000</output>

<gadget id="calculator">40 * 25</gadget>
<output>1_000</output>

<gadget id="calculator">2_000 + 1_000</gadget>
<output>3_000</output>

<result>3_000</result>