N = int(input())
P = 10 ** 9 + 7

def seki(X,Y):
    l = [[0] * 2 for _ in range(2)]
    for i in range(2):
        for j in range(2):
            for k in range(2):
                l[i][j] = (l[i][j] + X[i][k] * Y[k][j])%P
    return l
    
A = [[10,3],[0,1]]
tmp = [[1,0],[0,1]]
while N:
    if N & 1:
        tmp = seki(tmp,A)
    A = seki(A,A)
    N >>= 1
ans = tmp[0][0] + tmp[0][1]
print(ans%P)