c,t,m=map(int,input().split())
M=10**9+7
x=pow(c,M-2,M)
l=4

def seki(a,b):
  c=[[0]*l for i in range(l)]
  for i in range(l):
    for j in range(l):
      for k in range(l):
        c[i][j]+=a[i][k]*b[k][j]
        c[i][j]%=M
  return c

A=[
  [x,0,0,x],
  [0,x,(c-1)*x,(c-2)*x],
  [1,0,0,0],
  [0,1,0,0],
]
B=[
  [1,0,0,0],
  [0,1,0,0],
  [0,0,1,0],
  [0,0,0,1],
]

for i in range(30):
  if (t>>i)&1:
    B=seki(A,B)
  A=seki(A,A)
print((1-pow(1-B[0][0],m,M))%M)