import sys
input = sys.stdin.readline

mod=10**9+7

K=int(input())
DL=[tuple(map(int,input().split())) for i in range(K)]

DL.reverse()

DP=[[0]*7 for i in range(6)]
# DP[i][j]で、桁数 mod 6がi個、答え mod 7がjとなるものの個数

DP[0][0]=1
P=pow(9,5,7)
Q=[pow(10,i,7) for i in range(10)]
for D,L in DL:
    NDP=[[0]*7 for i in range(6)]

    x=D*(pow(10,L,7)-1)*P%7

    for i in range(6):
        for j in range(7):
            NDP[i][j]+=DP[i][j]
            NDP[(i+L)%6][(j+x*Q[i])%7]+=DP[i][j]

    for i in range(6):
        for j in range(7):
            DP[i][j]=NDP[i][j]%mod

ANS=0
for i in range(6):
    for j in range(7):
        ANS+=DP[i][j]*j
        ANS%=mod

print(ANS)