import sys
readline=sys.stdin.readline
from math import gcd as GCD

X=readline().rstrip()
if "." in X:
    i=X.index(".")
    a,b=int(X[:i]+X[i+1:]),10**(len(X)-(i+1))
    g=GCD(a,b)
    a//=g
    b//=g
else:
    a,b=int(X),1
print(a,"/",b,sep="")