There are 18 cartons of eggs in the store. After selling 630 kilograms, there are 5 cartons of 0.20 kilograms left. How many kilograms are in each carton of eggs?
商店有18箱鸡蛋，卖出去630千克后，还剩5箱零20千克，每箱鸡蛋有多少千克？
<gadget id="calculator">630 + 20</gadget>
<output>650</output>

<gadget id="calculator">18 - 5</gadget>
<output>13</output>

<gadget id="calculator">650 / 13</gadget>
<output>50</output>

<result>50</result>