What happens if the batsman hits the ball to a helmet that has been put down somewhere on the ground?

What happens if the batsman hits the ball to a helmet that has been put down somewhere on the ground?

If the ball strikes a helmet or any other piece of equipment that has been put down somewhere on the ground as the play is in progress, five runs are added to the runs already scored, including the run in progress, if the batsmen have crossed. If the batsman has hit the ball, he is given runs and whatever runs have been made before the ball hits the obstruction, if not, they are scored as byes, leg-byes etc.