import sys
import math
for line in sys.stdin:
    nums=list(map(int,line.strip().split()))
    #print(int(a[0]) + int(a[1]))
    a= nums[0]
    b= nums[1]
    x= 1/(b*math.log(a))
    max_value=math.log(x,a)-b*x
    print(round(max_value,10))