text: working_days_month = int(input())
  daily_salary = float(input())
  USD = float(input())
  month_salary = working_days_month * daily_salary
  year_salary = (month_salary * 12) + (month_salary * 2.5)
  year_salary_taxes = year_salary - (year_salary * (25/100))
  year_salary_leva = (year_salary_taxes * USD) / 365
  print(round(year_salary_leva, 2))
  