It's April Fools' Day, so let's review a character who's just a big joke.
Noah Kuttler, a.k.a. The Calculator, is a brilliant mathematical genius who has devised an unusual method for success as a supervillain. He engages in battle after battle with different superheroes, getting defeated each time... but his calculator costume records their fighting moves and powers, making sure that they can't beat him the same way again!
Up next on our parade of "characters based on office supplies", it's The Calculator. Although he was eventually developed into an evil version of Barbara Gordon's Oracle, this is not that. This is back when he was just a giant dork. Also, what kind of name is "Noah Kuttler"? If he'd been introduced in the Silver Age rather than the Bronze Age, he'd have been Calvin Quinn Layter or something, but personal calculators really weren't a thing yet then. This costume is bulkier than his his comic design, due to using existing molds, but this chest armor does allow us to plug the keypad brick onto his chest. Surprisingly, his purple chest is fully painted underneath the white armor. The visor on his helmet has 07734 displayed on it - why that, and not the other thing you can famously spell on a calculator? You know, 3080. Or, given his track record, 3507.