from sys import stdin
input = stdin.readline
from functools import lru_cache

@lru_cache(maxsize=1000)
def next():
    x = input().rstrip()
    return(x)
def nextint():
    x = int(input())
    return(x)
def nextfloat():
    x = float(input())
    return(x)
def nextlist():
    x = list(input().rstrip().split()) 
    return(x)
def nextintlist():
    x = list(map(int, input().rstrip().split())) 
    return(x)
def nextfloatlist():
    x = list(map(float, input().rstrip().split())) 
    return(x)  
def nextlist2():
  n = int(input())  # nは入力回数
  x = [input().rstrip() for _ in range(n)]
  return(x)
def nextintlist2():
  n = int(input())  # nは入力回数
  x = [int(input()) for _ in range(n)]
  return(x)
def nextfloatlist2():
  n = int(input())  # nは入力回数
  x = [float(input()) for _ in range(n)]
  return(x)
def nextdoublelist():
    n = int(input())  # nは入力回数
    x = [list(input().rstrip().split()) for _ in range(n)]
    return(x)
def nextdoubleintlist():
    n = int(input())  # nは入力回数
    x = [list(map(int, input().rstrip().split())) for _ in range(n)]
    return(x)
def nextdoublefloatlist():
    n = int(input())  # nは入力回数
    x = [list(map(float, input().rstrip().split())) for _ in range(n)]
    return(x)
def pow_k(x, n):
    """
    O(log n)
    """
    if n == 0:
        return 1

    K = 1
    while n > 1:
        if n % 2 != 0:
            K *= x
        x *= x
        n //= 2

    return K * x

s = nextintlist()
x = 1
y2 = 0
for i in range(s[0]):
    x *= (i + 1)
    if i % s[1] == 0:
        y2 += 1
xx = pow_k(x,x)
a1 = y2 * (xx)
print(int(a1 % 1000000007))