Yes, this behaviour depends on whether your specific model of calculator uses a higher priority for implicit multiplication.

Implicit multiplication being higher priority is a nice shorthand for reducing number of brackets when writing simple fractions without the proper typesetting of the horizontal line.

Because most mathematical works don’t have this typographical limitation, such statements don’t appear often. When they do appear, it’s just important that the convention within one text is consistent (and hopefully explicitly mentioned).

If you’re looking for gnarly shit, I highly suggest playing the weird route. When you start a new chapter 2 save file, backtrack ::: spoiler spoiler when noelle first joins your party. Then try using her ice magic. :::

The deltarune wiki has an article detaling exactly how to get it (you will get mildly spoiled): https://deltarune.wiki/w/Weird_Route/Chapter_2

Chapter 3 doesn’t really have content exclusive to this route, and in chapter 4 it will be obvious what you beed to do.

I agree about Tenna. Most of the fandom’s favourite characters are secret bosses or incredibly obscure and mysterious. If you don’t do a 100% playthrough you don’t get the full story of deltarune, it’s sad.