The school cafeteria shipped 300 kg of rice and ate 220 kg. If the remaining rice is eaten in 2 days, how many kilograms do you eat on average per day?
学校食堂运来300千克大米，吃了220千克．剩下的大米2天吃完，平均每天吃多少千克？
<gadget id="calculator">300 - 220</gadget>
<output>80</output>

<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<result>40</result>