The school cafeteria bought 490 kilograms of flour and 170 kilograms remained after eating for 16 days. How many kilograms of rice did you eat on average every day?
学校食堂买回490千克的面粉，吃了16天后还剩170千克，平均每天吃了多少千克大米？
<gadget id="calculator">490 - 170</gadget>
<output>320</output>

<gadget id="calculator">320 / 16</gadget>
<output>20</output>

<result>20</result>