k = int(input())
D = []
for _ in range(k):
    d, l = map(int, input().split())
    r = (pow(10, l, 7 * 9) - 1) // 9 * d % 7
    D.append((r, l))

mod = 10**9 + 7
ans = 0
DP = [0 for _ in range(7)]
for r, l in D:
    NDP = [0 for _ in range(7)]
    ans += r
    ans %= mod
    NDP[r] += 1
    for i in range(7):
        if DP[i]:
            nr = (i * pow(10, l, 7) + r) % 7
            ans += DP[i] * nr
            ans %= mod
            NDP[nr] += DP[i]
            NDP[nr] %= mod
            NDP[i] += DP[i]
            NDP[i] %= mod
    DP = NDP
print(ans)