chicken farm collects 16 kilograms of eggs in a box on Monday. After packing 21 boxes, there are still 18 kilograms left. How many eggs does this chicken farm collect on Monday?
一个养鸡场星期一收的鸡蛋，16千克装一箱，装了21箱后，还剩下18千克，这个养鸡场星期一收了多少个鸡蛋？
<gadget id="calculator">16 * 21</gadget>
<output>336</output>

<gadget id="calculator">336 + 18</gadget>
<output>354</output>

<result>354</result>