import sys
readline = sys.stdin.readline

K = int(readline())
mod = 10 ** 9 + 7
pre = [0] * 7
pre[0] = 1
inv = pow(9, 5, 7)
for i in range(K):
    D, L = map(int, readline().split())
    dp = [0] * 7
    ten = pow(10, L, 7)
    for j in range(7):
        dp[j] += pre[j]
        nex = j * ten + (ten - 1) * inv * D
        nex %= 7
        dp[nex] += pre[j]
        dp[j] %= mod
        dp[nex] %= mod
    dp, pre = pre, dp

ans = 0
for i in range(7):
    ans += i * pre[i]
    ans %= mod
    
print(ans)