"""

111111
mod 7か…

10^L 倍 + 

"""

import sys
from sys import stdin


def DL_seven(D,L): #DDDDDDDDDDD ← L個をmod7で求める

    ret = [D % 7]

    while True:

        nex = (ret[-1] * 10 + D) % 7
        if nex == ret[0]:
            break
        ret.append(nex)

    #print (ret)
    return ret[(L-1) % len(ret)]

#print (DL_seven(1,4))


K = int(stdin.readline())

dp = [0] * 7
dp[0] = 1
mod = 10**9+7

for loop in range(K):

    D,L = map(int,stdin.readline().split())

    ndp = [ i % mod for i in dp ]

    ndl = DL_seven(D,L)

    #追加する場合
    for i in range(7):

        nex = (i * pow(10,L,7) + ndl) % 7
        ndp[nex] += dp[i]

    dp = ndp

dp[0] -= 1

ans = 0
for i in range(7):

    ans += dp[i] * i

ans %= mod

print (ans)