import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;

auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}

void main()
{
  long n, k; readV(n, k);

  auto x = n/k, y = 0L;
  if (k%2 == 0) y = x + (n%k >= k/2 ? 1 : 0);

  writeln(x^^3+y^^3);
}
