280
About 280 million.
280 ml of water is 280 grams
280/5 = 56
280 000 000 exact
280/10 = 28
280 people were killed by druk driving accidents in 2013
280 kilograms = 280,000,000 milligrams
in 280 metres there are 0.28 kilometers
280 hectoliters = 280,000 deciliters
280 pounds is 4,480 ounces.
280 centimeters = 9.18635171 feet