The volume of a watermelon is about 8 cubic decimeters.
The volume of the refrigerator is about 150 cubic decimeter.
The volume of a matchbox is about 12 cubic centimeter.
The volume of the ink bottle is about 60 ml.
The volume of thermos bottle is about 2 liters.
3* 1000+20=3020
2.25* 1000=2250