連分數

 

 a1, b1 = map(int, input().split())

a2, b2 = map(int, input().split())

a3, b3 = map(int, input().split())

s3down = b3

s3top = b2 * b3 + a3

s2down = s3top

s2top = b1 * s3top + a2 * s3down

s1down = s2top

s1top = a1 * s2down

print(f'{s1top}/{s1down}\n')

# input

# 3  2

# 1  4

# 1  2

# Output:

# 27/20