## https://yukicoder.me/problems/no/2017

SMALL_MOD = 7
MOD = 10 ** 9 + 7

def main():
    K = int(input())
    dl = []
    for _ in range(K):
        D, L = map(int, input().split())
        dl.append((D, L))
    

    dp = [[0] * SMALL_MOD for _ in range(K + 1)]
    dp[0][0] = 1
    for i in range(K):
        d, l = dl[i]
        pow_10_l = pow(10, l, SMALL_MOD)

        # dをl個並べた時の値計算
        val = 0
        x = d
        length = 1
        while l > 0:
            y = pow(10, length, SMALL_MOD)
            if l % 2 == 1:
                val *= y
                val %= SMALL_MOD
                val += x
                val %= SMALL_MOD
            
            y0 = (x * y) % SMALL_MOD
            x = (y0 + x) % SMALL_MOD
            length *= 2
            l //= 2

        for j in range(SMALL_MOD):
            dp[i + 1][j] += dp[i][j]
            dp[i + 1][j] %= MOD

            new_j = j * pow_10_l
            new_j %= SMALL_MOD
            new_j += val
            new_j %= SMALL_MOD

            dp[i + 1][new_j] += dp[i][j]
            dp[i + 1][new_j] %= MOD

    answer = 0
    for i in range(SMALL_MOD):      
        ans = i * dp[-1][i]
        ans %= MOD
        answer += ans
        answer %= MOD
    print(answer)  




if __name__ == '__main__':
    main()