mod=10**9+7
X=[0]*7
X[0]=1
for t in range(int(input())):
  d,l=map(int,input().split())
  a=pow(10,l,7)
  b=((a-1)*d%7)*pow(9,5,7)%7
  Y=X[:]
  for i in range(7):
    Y[(a*i+b)%7]=(Y[(a*i+b)%7]+X[i])%mod
  X=Y[:]
print(sum([i*X[i] for i in range(7)])%mod)