https://www.luogu.com.cn/problem/P1888
""" P1888 三角函数 https://www.luogu.com.cn/problem/P1888 """ def gcd(x,y): z=y while x%y!=0: z=x%y x=y y=z return z a=list(map(int,input().split())) #a=[int(i) for i in a] a=sorted(a) b=a[2] c=a[0] gcd_ans=gcd(b,c) print("%d/%d" %(a[0]//gcd_ans,a[2]//gcd_ans))