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)]
    P=[-1]*N
    for i in range(N-1):
        a,b=MI()
        a-=1
        b-=1
        to[a].append(b)
        P[b]=a
    
    L=[]
    LL=[]#帰り順
    
    root=0
    for i in range(N):
        if P[i]==-1:
            root=i
        
    L.append(root)

        
    D=[0]*N
    while L:
        v=L.pop()
        for nv in to[v]:
            D[nv]=D[v]+1
            L.append(nv)
            LL.append(nv)
            
    ch=[0]*N#子を根とする木のサイズ
            
    for v in LL[::-1]:
        p=P[v]
        ch[p]+=ch[v]+1
                
    ans=0
    
    for i in range(N):
        ans=(ans+(D[i])*(ch[i]+1))%mod
    print(ans)
    


    


main()