#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define REP(i,n) for(int i=0,_n=(int)(n);i<_n;++i)
#define ALL(v) (v).begin(),(v).end()
#define CLR(t,v) memset(t,(v),sizeof(t))
template<class T1,class T2>ostream& operator<<(ostream& os,const pair<T1,T2>&a){return os<<"("<<a.first<<","<<a.second<< ")";}
template<class T>void pv(T a,T b){for(T i=a;i!=b;++i)cout<<(*i)<<" ";cout<<endl;}
template<class T>void chmin(T&a,const T&b){if(a>b)a=b;}
template<class T>void chmax(T&a,const T&b){if(a<b)a=b;}

ll nextLong() { ll x; scanf("%lld", &x); return x;}

const ll MOD = 1e9 + 7;


const int MAX_N = 1123456;
vector<int> g[MAX_N];

ll ans;
int dfs(int u, int depth) {

  int sum_child = 0;

  for (int v : g[u]) {
    int num_child = dfs(v, depth + 1);
    sum_child += num_child;
    ans += (ll)(depth + 1) * (ll)num_child;
    ans %= MOD;
  }

  return sum_child + 1;
}


int main2() {
  int N = nextLong();

  vector<int> indeg(N);
  REP(i, N-1) {
    int a = nextLong() - 1;
    int b = nextLong() - 1;
    g[a].push_back(b);
    ++indeg[b];
  }

  int root = 0;
  REP(i, N) if (indeg[i] == 0) root = i;

  ans = 0;
  dfs(root, 0);

  ans %= MOD;
  cout << ans << endl;

  REP(i, N) g[i].clear();
  return 0;
}

int main() {

#ifdef LOCAL
  for (;!cin.eof();cin>>ws)
#endif
    main2();
  return 0;
}