#!/usr/bin/env python
import sys

mhash = 1
hashrate = mhash * 1000000

currentdiff = float(sys.argv[1])
blockreward = float(sys.argv[2])
price = float(sys.argv[3])

time = currentdiff * 2**32 / hashrate
coinsperday = blockreward * 86400 / time

profit = coinsperday * price
print profit