#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <array>
#include <atcoder/modint>

using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)


const i64 INF = 1001001001001001001;
using modint = atcoder::static_modint<1000000007>;

int main(){
    int K; cin >> K;
    modint dp[7];
    dp[0] = 1;
    rep(i,K){
        modint dpbuf[7];
        rep(i,7) dpbuf[i] = dp[i];
        int d; cin >> d;
        int L; cin >> L; L %= 6;
        int mult = 1; rep(i,L) mult = (mult * 10) % 7;
        int off = 0; rep(i,L) off = (off * 10 + d) % 7;
        rep(i,7) dpbuf[(i*mult+off)%7] += dp[i];
        rep(i,7) dp[i] = dpbuf[i];
    }
    dp[0] -= 1;
    modint ans = 0;
    rep(i,7) ans += dp[i] * i;
    cout << ans.val() << '\n';
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;