Shared plates are the point
A €12 starter shared by three people is €4 each. A €24 pizza where one person had twice as much is €12, €6 and €6. A €30 bottle of wine shared by everyone except one person splits three ways, not four. All of that is a couple of taps.
Quantities work the way a receipt does: three beers at €6.50 is one line worth €19.50, which you can leave as a single shared line or duplicate into separate ones.