There are 14 cartons of duck eggs in the store. After selling 250 kg, there are 4 cartons of 0.20 kg left. How many kilograms are there in each carton 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>