There are 14 boxes of duck eggs in the shop. After selling 250 kilograms, there are still 4 boxes of 0.20 kilograms. How many kilograms are there in each box of duck eggs?
商店有14箱鸭蛋，卖出去250千克后，还剩4箱零20千克，每箱鸭蛋有多少千克．
<gadget id="calculator">250 + 20</gadget>
<output>270</output>

<gadget id="calculator">14 - 4</gadget>
<output>10</output>

<gadget id="calculator">270 / 10</gadget>
<output>27</output>

<result>27</result>