Grandma Wang put the harvested corn in the same big bag, and she packed 22 bags in total. She weighed 5 of them, and the results were 39 kg, 41 kg, 38 kg, 42 kg, and 40 kg. How many kilograms of corn did she harvest in total?
王奶奶把收获的玉米装在同样大的袋子里，一共装了22袋．她称了其中的5袋，结果分别是39千克、41千克、38千克、42千克、40千克．她大约一共收获玉米多少千克？
<gadget id="calculator">39 + 41 + 38 + 42 + 40</gadget>
<output>200</output>

<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<gadget id="calculator">40 * 22</gadget>
<output>880</output>

<result>880</result>