The Cosmic Burger Bar was a place that had been rumoured in high school for years. It was rumoured that once a year a penguin in trainers would come out of the kibbutz and order a double cheeseburger, but no one had proved it. That evening, Zosia, Adaś and Igor decided to test the legend for themselves. Before they went inside, Igor announced: "If we meet aliens here, I take a selfie even with a UFO!". They went in - and immediately realised that this was no ordinary bar. Behind the counter was a chef in a checked apron and pink hair, who was cracking eggs in the air (literally - the eggs were levitating above the pan). Posters of alien chess matches hung on the walls and a series about maths ninjas was playing on the TV. But the strangest thing was the pancakes: they flew through the air and loudly recited the patterns of sum squares. "I think it's a dream," whispered Zosia. However, a sudden light flicked on and a penguin in trainers ran out of the kitchen, holding a calculator in its wings. "Alarm! Invasion of π pancakes!" - shouted the cook, throwing a wooden ladle at Zosia. Suddenly, the door slammed with a bang and numbers began to spiral on the ceiling. Adaś was the first to jump up, pointing his finger at Igor: "It's because of you! Then a silhouette in a silver jumpsuit emerged from behind the bar, and mathematical pancakes began to gather around the three teenagers, reciting more and more patterns faster and faster. The light flicked on once more, and the penguin pressed the magic button on the calculator....