If you sign in with a day 4 experience, 300000/4 = 75000 days, if start check-in at the age of 1, 100 = 100 days, you want to live almost 200 years to keep every sign in (who knows there is no sign in this thing after 200), water 4 experience again if you every day, half the time, but considering the reality, you can't live again in 100, in 50 years, you have to water every day 16 experience, may be you are a diligent person, every day water 32 experience, that needs to be 25 years!!!!!!!!!!! Ag