MOD = 10 ** 9 + 7

k = int(input())
dp = [0] * 7
dp[0] = 1
for _ in range(k):
    d, l = map(int, input().split())
    l %= 6
    times = pow(10, l, 7)
    plus = 0
    for _ in range(l):
        plus += d
        d *= 10
    plus %= 7
    ndp = dp[:]
    for i in range(7):
        ndp[(i * times + plus) % 7] += dp[i]
        ndp[i] %= MOD
    dp = ndp
ans = sum(i * d for i, d in enumerate(dp))
print(ans % MOD)