Venus::Number->make;
# Exception!

Venus::Number->make(0,0);
# bless(..., "Venus::Number")

Venus::Number->make(1);
# bless(..., "Venus::Number")

Venus::Number->make('abc');
# Exception!

Venus::Number->new([3,2,1]);
# Exception!

Venus::Number->new([3,2,1])->abs;
# Exception!