Write a python program witg a product price first increased by $20\%$ and then has been reduced by the same percentage. How the new price changed comparing to the original? $($lastname$\_$Simple$2.$py$).$ It is necessary to input at least one parameter $-$ the original price.

The result should look as follows:

The original price: $100\mathrm{.}00$

The price after increase: $120\mathrm{.}00$

The price after decrease: $96\mathrm{.}00$

The difference is: $4\mathrm{.}0$