K = int(input())
D = []
L = []
for _ in range(K):
    d,l = map(int,input().split())
    D.append(d)
    L.append(l)
P = 10 ** 9 + 7
inv = pow(9,5,7)
beki = [pow(10,i,7) for i in range(6)]
dp = [[0] * 7 for _ in range(6)]
dp[0][0] = 1
ans = 0

for i in range(K - 1,-1,-1):
    d,l = D[i],L[i]
    nx = [[0] * 7 for _ in range(6)]
    
    for j in range(6):
        for k in range(7):
            u = (j + l) % 6
            tmp = beki[u] - beki[j]
            tmp = (tmp * inv * d + k) % 7
            ans += tmp * dp[j][k] % P
            ans %= P
            nx[j][k] += dp[j][k]
            nx[(j + l) % 6][tmp] += dp[j][k]
    for j in range(6):
        for k in range(7):
            nx[j][k] %= P
    #print(ans)
    dp = nx
print(ans)
t = 0
for i in range(6):
    for j in range(7):
        t += dp[i][j]
#print(t)