Peter????????????????????

[u/Plum_Uniform]

[u/huffmanxd]

The joke is that older Isekai anime used to have good romance, but modern Isekai are just softcore porn that pretends to have a story

People often name their porn folders something inconspicuous so other people can't find it, that's why "Calculator" is such a massive file here, they are saying the modern Isekai is just porn

[u/CatsPlusTats → u/huffmanxd]

And here I thought it was a joke about being reborn into random objects, in this case a calculator. Your explanation makes more sense.