Kanzenshuu

I’ve seen Herms say the box about fusion says it multipliers powers together, but I’ve also seen translations saying it just combines and the term can’t be interpreted as multiplication. Which one is it? https://i.imgur.com/utwkp7l.png 悟空のフュージョン講座 Goku's Fusion Course "悟空が、あの世で会ったメタモル星人に教わったとい...