#define _USE_MATH_DEFINES
 
#include <iostream>
#include <iomanip>
#include <sstream>
 
#include <algorithm>
#include <cmath>
 
#include <string>
//#include <array>
#include <list>
#include <queue>
#include <vector>
#include <complex>
#include <set>
#include <map>
 
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
 
#define PII pair<int,int>
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////
const int nmax = 30000;
LL C[nmax];
string D[nmax];

const LL mod = (LL)1e9+7;

LL powmod(LL n,LL p){
	if(p==0)return 1;
	LL ans = 1;
	LL mul = n;
	while( p ){
		if( p%2 ){
			ans = (ans * mul)%mod;
		}
		p /= 2;
		mul = (mul * mul)%mod;
	}
	return ans;
}

LL invMod(LL a){
	return powmod(a,mod-2);
}

LL conv(LL n,LL k){
	if( k == 0 || k == n) return 1;
	if( k < 0 || n < k ) return 0;
	k = min(k,n-k);
	LL ans = 1;
	for(int i=k;i>0;--i){//////////
		ans = ( ans * ( (n-k+i) * invMod(i) ) % mod ) % mod;
	}
	return ans;
}

//string  % (mod -1)
LL powStrMod(LL n,string num){//n^num % mod
	LL ans = 1;
	LL mul = n;
	int keta[201];
	int ketamax = num.size();
	for(int i=num.size();i>0;--i){
		keta[ketamax-i+1] = num[i-1]-'0';
	}
	while( ketamax ){
		if(keta[1]%2){
			ans = (ans * mul)%mod;
		}
		//p /= 2;
		for(int i= ketamax;i>0;--i){
			int ks=0;
			if( keta[i] % 2 ) ks = 10;
			keta[i] /= 2;
			if( i == ketamax && keta[i]==0) --ketamax;
			if(i>1){
				keta[i-1] += ks;
			}
		}
		mul = (mul * mul)%mod;
	}
	return ans;
}

int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    //cout << setprecision(16);//
	
	int N;
	cin >> N;//机の種類
	rep(i,N){
		//Ck 椅子の数　D個(D乗)
		cin>>C[i]>>D[i];
	}


	///////////////
	LL ans,tans;
	ans = 1;
	rep(i,N){
		//C[i]
		tans = 0;
		for(int j=0;j<=(1+C[i])/2;++j){
			tans = ( tans + conv( C[i]+1-j, j) ) % mod;
		}

		//
		//tans = tans^D[i] % mod;
		tans = powStrMod(tans,D[i]);
		//ans = (ans * tans)% mod;
		ans = (ans * tans)% mod;
	}
	P(ans);
	return 0;
}