Walt Disney's Donald Duck Adventures #26

When Donald Duck’s sneezes at an auction are mistaken for bids, he and his nephews Huey, Dewey, and Louie find themselves sailing down the Ohio River in a houseboat—only to encounter a monstrous serpent lurking in the water. As the boys grow increasingly spooked by the creature, they soon discover the terrifying sight is actually an elaborate submarine, its captain delighting in the fear he stirs.

In "Donald Duck in Mathmagic Land," a bewildered Donald Duck finds himself swept into a dazzling dream journey guided by the enigmatic Spirit of Mathematics, where numbers come alive and geometry shapes the world around him. With Huey, Dewey, and Louie watching from the sidelines and Uncle Scrooge just out of reach, Donald encounters mathematical wonders from ancient times to futuristic visions—each lesson leaving him more amazed than before. Though it’s all just a dream, the experience changes how he sees the world when he wakes up.