import sys
input=sys.stdin.readline
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))

def main():
    mod=10**9+7
    N=I()
    to=[[]for _ in range(N)]
    fro=[[]for _ in range(N)]
    for i in range(N-1):
        a,b=MI()
        a-=1
        b-=1
        # a,b=i,i+1
        to[a].append(b)
        fro[b].append(a)
        
    root=0
    for i in range(N):
        if len(fro[i])==0:
            root=i
            break
        
    import queue
    q=queue.Queue()
    q.put(root)
        
    D=[0]*N
    while not q.empty():
        v=q.get()
        for nv in to[v]:
            D[nv]=D[v]+1
            q.put(nv)
            
    ch=[0]*N#子を根とする木のサイズ
    used=[0]*N
    for i in range(N):
        if len(to[i])==0:
            q.put(i)
            used[i]=1
            
    while not q.empty():
        v=q.get()
        for nv in fro[v]:
            ch[nv]+=ch[v]+1
            if used[nv]==0:
                q.put(nv)
            used[nv]=1
                
    ans=0
    for i in range(N):
        temp=((D[i])*(ch[i]+1))%mod
        ans=(ans+temp)%mod
    print(ans)

    


main()