Dongdong's family raises some ducks, half of them are in the water, and half of the remaining ducks are in the woods and half are outside the woods. There are 20 ducks outside the woods. How many ducks are raised in Dongdong's family?
冬冬家养了一些鸭，其中一半在水里，剩下的鸭一半在树林里，一半在树林外，树林外的鸭有20只，冬冬家一共养鸭多少只．
<gadget id="calculator">20 * 2 * 2</gadget>
<output>80</output>

<result>80</result>