Limin fast food restaurant donated 20 bags of rice and 20 bags of flour to a certain disaster area. Each bag of rice was 50 kilograms, and each bag of flour was 25 kilograms. How many kilograms of flour and rice are there in total?
利民快餐店向某灾区捐献大米、面粉各20袋，每袋大米50千克，每袋面粉25千克，面粉和大米共多少千克？
<gadget id="calculator">50 * 20</gadget>
<output>1_000</output>

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

<gadget id="calculator">1_000 + 500</gadget>
<output>1_500</output>

<result>1_500</result>