import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}
    public boolean hasNext() { skipUnprintable(); return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
}

public class Main {

	public static void main(String[] args) {
		long curtime=System.currentTimeMillis();
		new Main().run();
		System.err.println(System.currentTimeMillis()-curtime);
	}
	
	final long MOD=(long)1e9+7;

	void run() {
		FastScanner sc=new FastScanner();
		int N=(int)sc.nextLong();
		ArrayList<Integer>[] g=new ArrayList[N];
		for (int i=0;i<N;++i) g[i]=new ArrayList<>();
		boolean[] isroot=new boolean[N];
		Arrays.fill(isroot, true);
		for (int i=0;i<N-1;++i) {
			int a=(int)sc.nextLong();
			int b=(int)sc.nextLong();
			--a;--b;
			g[a].add(b);
			isroot[b]=false;
		}
		int root=-1;
		for (int i=0;i<N;++i) if (isroot[i]) root=i;
	
		ArrayList<Integer> order=new ArrayList<>();
		ArrayDeque<Integer> stack=new ArrayDeque<>();
		int[] d=new int[N];
		int[] sz=new int[N];
		stack.addFirst(root);
		while (!stack.isEmpty()) {
			int v=stack.pollFirst();
			order.add(v);
			for (int dst:g[v]) {
				d[dst]=d[v]+1;
				stack.addFirst(dst);
			}
		}
		
		long ans=0;
		for (int i=order.size()-1;i>=0;--i) {
			int v=order.get(i);
			sz[v]=1;
			for (int dst:g[v]) sz[v]+=sz[dst];
			ans+=(long)d[v]*sz[v]%MOD;
			if (ans>=MOD) ans-=MOD;
			
		}
		System.out.println(ans);
		
	}
	
	
	
	void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));}
}