The big finale to the Calculator sage, by Bob Rozakis, Marshall Rogers and Terry Austin takes up all of Detective 468 (March/April 1977).
As Hawkman predicted last issue, the Calculator does indeed go up against Batman, and is defeated by him, as he was with all the previous heroes. But once again, he presses that special button.
One thing that makes this story entertaining is its use of Morgan Edge, normally a supporting character in the Superman books. He is trying to secure Bruce Wayne’s vote on the sales of a division of Galaxy Communications, and though he does, in the end, give Batman the inspiration for beating the Calculator, he never does get the signature he needs.
The effect of the Calculator’s special button is to ensure that he cannot be beaten a second time by a given hero. It’s never really clear how his machine does this, or any of the other amazing things it does. But it does make for a great spread, as the heroes take each other down. The Atom, Black Canary, Elongated Man, Green Arrow and Hawkman all have small roles in this story, but it’s really a Batman tale, not even a team-up.
Ultimately, Batman outwits the Calculator, and has him defeat himself. Batman goads him into creating a cage, while standing on a spinnable floor. The Calculator winds up trapped by his own creation.
Likely because his suit was never really explainable, the Calcualtor did not move on from this introductory run to become a major player. He next appeared against the Atom in the early 80s, in the pages of Action Comics, and would pop up from time to time in different books. It was not until the millennium that he got reworked into an impressive villain again.