func int main(){
  matrix a<2,2>;
  int b;
  matrix res<2,2>;
  a = [1,2;3,4];
  b = 2;
  res = a + b;
  print(res);
  res = b + a;
  print(res);
  res = a * b;
  print(res);
  res = b * a;
  print(res);
  return 0;
}
