The cafeteria shipped 850 kilograms of rice and ate it for 16 days, with an average of 28 kilograms per day. How many kilograms of rice are left?
食堂运来了850千克大米，吃了16天，平均每天吃28千克，还剩多少千克大米？
<gadget id="calculator">28 * 16</gadget>
<output>448</output>

<gadget id="calculator">850 - 448</gadget>
<output>402</output>

<result>402</result>