Parent poster is aiming at calculator app as "something people do in react and should be complex" - calculator app is still graduate level thing of limited scop

Parent poster is aiming at calculator app as "something people do in react and should be complex" - calculator app is still graduate level thing of limited scope and quite well defined. I assume he have not seen any project that grows for 5+ years has 20 dev working on it (20 because of team rotation maybe 3-5 working at the same time).