Number of people I'm interested * Number of people who respond
(1 / 60) * (1 / 60) = 3600 people to get one match.
Times 300 = 1.08 million profiles I'd have to view.
Maybe you like 1 of 6? (is it that high, for most people I don' think so). And you manage to get a response from 1 of 10 (because I'd expect the other side to also be at best 1 of 6 + less likely to respond)
So, that's basically saying you went through a minimum of 18k profiles to get your 300 matches.
Did you get 300 matches or is that just a statement that you did well and the numbers aren't actual numbers?