import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)


def modinv(a, mod=10 ** 9 + 7):
    return pow(a, mod - 2, mod)


b, c, d = map(int, readline().split())
mod = 10 ** 9 + 7
b %= mod
c %= mod
if c == 1:
    print(b * d % mod)
elif d == 1:
    print(b * c % mod)
else:
    print(b * ((pow(c, d + 1, mod) + mod - c) % mod) * modinv(c - 1, mod) % mod)