import enum
import os
class Fenshu(enum.Enum):
Fenzi=0
Fenmu=1
# 辗转相除法
def a(n1,n2):
data=max(n1,n2)%min(n1,n2)
if data!=0:
result=a(min(n1,n2),data)
else:
return min(n1,n2)
return result
data=int(input())
# 如果输入为0 直接结束程序
if data==0:
print(0)
os._exit(0)
datas=input().split()
# print(datas)
dicts=[[]*1000]*1000
# print(dicts)
for i in range(data):
dicts[i]=datas[i].split("/")
# 将字典里的str转换为int 类型
dicts=[[int(x) for x in y]for y in dicts]
# print(dicts[0][Fenshu.Fenzi.value])
# g最大公约数
# 计数
count=0
result_fenzi=dicts[count][Fenshu.Fenzi.value]
result_fenmu=dicts[count][Fenshu.Fenmu.value]
while(True):
# first_fenzi=dicts[count][Fenshu.Fenzi.value]
# first_fenmu=dicts[count][Fenshu.Fenmu.value]
next_fenzi=dicts[count+1][Fenshu.Fenzi.value]
next_fenmu=dicts[count+1][Fenshu.Fenmu.value]
# 如果分子等于0直接跳过这个数就ojbk了
if next_fenzi!=0:
g=a(result_fenmu,next_fenmu)
# 得到分子所需的倍数
g1= (result_fenmu/g*next_fenmu)/result_fenmu
g2=(next_fenmu/g*result_fenmu)/next_fenmu
result_fenzi = result_fenzi * g1 + next_fenzi * g2
# 如果出现 前面一个数和后面一个数相加等于0 跳过这两个数从第三个数开始循环，如果没有第三个数 直接赋值 跳出循环
if result_fenzi==0:
if count+2>=data-1:
result_fenmu=0
break
else:
result_fenzi=dicts[count+2][Fenshu.Fenzi.value]
result_fenmu=dicts[count+2][Fenshu.Fenmu.value]
count=count+2
continue
result_fenmu=g1*result_fenmu
# 这里是约分 因为相乘起来数会很大 越过最大的int，所以除以最大公约数
g3=a(abs(result_fenmu),abs(result_fenzi))
if g3>1:
result_fenmu=result_fenmu/g3
result_fenzi=result_fenzi/g3
if count+1 >= data-1:
break
count+=1
# 如果是0的话直接输出0
if result_fenzi==0:
print("0")
elif abs(result_fenzi) < abs(result_fenmu):
print("{0}/{1}".format(int(result_fenzi), int(result_fenmu)))
elif abs(result_fenzi)
