The school cafeteria transports 120 bags of rice and 120 bags of flour at a time, each bag of rice is 50 kg, and each bag of flour is 25 kg. How many kilograms of grain were transported in total? (answer in two ways)
学校食堂一次运进大米和面粉各120袋，每袋大米50千克，每袋面粉25千克．一共运进粮食多少千克？(用两种方法解答)
<gadget id="calculator">50 * 120</gadget>
<output>6_000</output>

<gadget id="calculator">25 * 120</gadget>
<output>3_000</output>

<gadget id="calculator">6_000 + 3_000</gadget>
<output>9_000</output>

<result>9_000</result>