Oh, dude, you're hitting me with some math now? Alright, so when you divide 273 by 13, the quotient is 21 and the remainder is 0. Basically, you divide 273 by 13, get 21, and there's nothing left over. Math is cool, I guess.
26.1538
48.4615
263.6154
0.0131
7
0.0476
5.1538
3.25
154
98.3939
2.2308
6778/15 = 451 and remaider 13