280 = CCLXXX
280 × 10^8
280,000,000,000
$2.80
doscientos ochenta
Any integer can be written over 1. 280/1
280 million can also be written as 2.8*108 or 2.8E8.
280%
280% as an improper fraction in its simplest form is 14/5
204
Two hundred and eighty
deux cent quatre vingt