from math import log

def com_max(a, b):
    x = 1 / (b * log(a))
    ans = log(x)/log(a) - b*x
    return ans

def main():
    nums = [int(i) for i in input().split()]
    a = nums[0]
    b = nums[1]
    result = com_max(a, b)
    print(f"{result: .10f}")

if __name__ == "__main__":
    main()