a,b,t = STDIN.read.chomp.split(" ")

tot_time = t.to_f + 0.5
time_span = a.to_f
buisquets_per_span = b.to_i

tot_buisquets = 0
tot_time.div(time_span).floor.times do |i|
  tot_buisquets += buisquets_per_span
end
puts tot_buisquets.to_i
