import sys

input = sys.stdin.buffer.readline

K = int(input())
DL = tuple(tuple(map(int, input().split())) for _ in range(K))

dp = [0] * 7
dp[0] = 1
MOD = 10 ** 9 + 7
i9 = pow(9, 7 - 2, 7)
for d, l in DL:
    new_dp = dp.copy()
    p = pow(10, l, 7)
    for i in range(7):
        j = i * p + (p - 1) * i9 * d
        j %= 7
        new_dp[j] += dp[i]
    dp = new_dp
    for i in range(7):
        dp[i] %= MOD
dp[0] -= 1

ans = 0
for i in range(1, 7):
    ans += dp[i] * i
ans %= MOD
print(ans)