Retail price issue and decimal points

Hello,
I am having to set prices on my backend with 3 numbers after the decimal point which is not good (lots of work).
For example, my product sells for 20 EUR (including 19% VAT). So in backend I set the net price as 16.81, which = 20 EUR (with 19% VAT added).

However when you buy 3 of these products it should be 60 EUR total, but instead it says 60,01 EUR.
The customer will not be happy, so in backend I have to put 16.807 EUR. If I do this then I get 60.00 EUR exactly when customer buys 3 of this product. But if they buy 4 then I have the problem again!

Do you not have a solution where we can enter the exact gross price for a product or a solution where this problem does not occur? It creates a lot of extra work for administrators and potential problems for customers.