Answer :
Myles ran 2 times what alison ran:
2x21 = 42
Hector ran 5 times as many miles as Myles:
42x5 = 210
therefore Hector ran 210 miles.
2x21 = 42
Hector ran 5 times as many miles as Myles:
42x5 = 210
therefore Hector ran 210 miles.