[2-3-7-43-1807]

nice concept but a very bad choice to illustrate good UI. there is enough space to add a few more buttons with dedicated functions.

[billmcneale]

In 2025, sure. Back when that calculator came out, this kind of saving was probably worth it.

[2-3-7-43-1807]

eh why? believe it or not but they had even keyboards back then with many dozens of keys.