import math
x = input()

num = 0
cnm = -1

for i in range(len(x)):
    if x[i] == ".":
        cnm = len(x)-i-1
    else:
        num = num*10+int(x[i])
        
#print(num)
if cnm == -1:
    print(num,"/",1,sep="")
    exit()
else:
    shi,bo = num,10**cnm
    gd = math.gcd(shi,bo)
    #print(gd)
    print(shi//gd,"/",bo//gd,sep="")
#print(cnm)
#print(10**2)