#include <bits/stdc++.h>
#include <cassert>
typedef long long int ll;
using namespace std;

#if defined(DEBUG)

#include <unistd.h>
#include <sys/fcntl.h>
#define DLOG(...)        cerr << dbgFormat(__VA_ARGS__) << endl
#define DCALL(func, ...) func(__VA_ARGS__)

template <class... Args>
string dbgFormat(const char* fmt, Args... args) {
  size_t len = snprintf(nullptr, 0, fmt, args...);
  char buf[len + 1];
  snprintf(buf, len + 1, fmt, args...);
  return string(buf);
}

#else  // defined(DEBUG)

#define DLOG(...)
#define DCALL(func, ...)

#endif // defined(DEBUG)

ll MOD = 1e9 + 7;

// g = eGCD(a, b, s, t)  --->  sa + tb = g
constexpr ll eGCD(ll a, ll b, ll& s, ll& t) {
  if (a == 0) {
    s = 0;
    t = 1;
    return b;
  }
  ll u = 0;
  ll g = eGCD(b % a, a, t, u);
  s = u - (b / a) * t;
  return g;
}

constexpr ll gcd(ll a, ll b) {
  ll dummy1 = 0;
  ll dummy2 = 0;
  return eGCD(a, b, dummy1, dummy2);
}

struct Fp {
  ll val;

  Fp(ll t = 0) :
    val(t < 0 ? MOD + t % MOD : t >= MOD ? t % MOD : t) {}

  Fp& operator +=(const Fp& t) {
    val += t.val;
    if (val >= MOD) val -= MOD;
    return *this;
  }

  Fp& operator -=(const Fp& t) {
    val -= t.val;
    if (val < 0) val += MOD;
    return *this;
  }

  Fp& operator *=(const Fp& t) {
    val = (val * t.val) % MOD;
    return *this;
  }

  Fp inv() const {
    if (val == 0) {
      cerr << "inv() is called for zero." << endl;
      exit(1);
    }
    ll u = 0;
    ll v = 0;
    eGCD(val, MOD, u, v);
    return Fp(u);
  }

  Fp& operator /=(const Fp& t) {
    return (*this) *= t.inv();
  }

  Fp operator +(const Fp& t) const { return Fp(val) += t; }
  Fp operator -(const Fp& t) const { return Fp(val) -= t; }
  Fp operator *(const Fp& t) const { return Fp(val) *= t; }
  Fp operator /(const Fp& t) const { return Fp(val) /= t; }
  Fp operator -() const { return Fp(-val); }

  bool operator ==(const Fp& t) const { return val == t.val; }
  bool operator !=(const Fp& t) const { return val != t.val; }
  
  operator ll() const { return val; }

};

class Comb {
  int nMax;
  vector<Fp> vFact;
  vector<Fp> vInvFact;
public:
  Comb(int nm) : nMax(nm), vFact(nm+1), vInvFact(nm+1) {
    vFact.at(0) = 1;
    for (int i = 1; i <= nMax; i++) vFact.at(i) = i * vFact.at(i-1);
    vInvFact.at(nMax) = vFact.at(nMax).inv();
    for (int i = nMax; i >= 1; i--) vInvFact.at(i-1) = i * vInvFact.at(i);
  }
  Fp fact(int n) { return vFact.at(n); }
  Fp comb(int n, int r) {
    return vFact.at(n) * vInvFact.at(r) * vInvFact.at(n-r);
  }
  // The number of permutation extracting r from n.
  Fp perm(int n, int r) {
    return vFact.at(n) * vInvFact.at(n-r);
  }
};



int main(int argc, char *argv[]) {
#if defined(DEBUG)
  // GDB on Cygwin ignores redirection at run command.
  if (argc == 2) dup2(open(argv[1], 0), 0);
#else
  // For performance.  We should not use C-style stdio functions
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
#endif
  cout << setprecision(20);

  int N, KK; cin >> N >> KK;
  Fp K = KK;
  vector<int> A(N);
  for (int i = 0; i < N; i++) cin >> A.at(i);
  
  Fp r1 = 0;
  for (int i = 0; i < N; i++) {
    for (int j = i + 1; j < N; j++) {
      if (A.at(i) > A.at(j)) r1 += (Fp)1;
    }
  }

  Fp r2 = 0;
  sort(A.begin(), A.end());
  Fp cnt = 0;
  for (int i = 1; i < N; i++) {
    if (A.at(i-1) == A.at(i)) {
      r2 += cnt;
    }else {
      cnt = i;
      r2 += cnt;
    }
  }

  Fp ans = K * (K - (Fp)1) / (Fp)2 * r2 + r1 * K;
  cout << (int)ans << endl;

  return 0;
}



Measured memory_bytes: 256