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  1. check you estimated time for get a block
    it's not a static value, we take as example
    estimated time = 480 minutes = 6 hours
    your Khps = ± 25k
  2. 480 min = ± estimated 1 - 4 blocks day (maybe more, maybe less)
  3. profit
    1 block = ± 1 STEEM = ± 0.0053 BTC (from bittrex market data: )