Cultivating Immortality in a World Where Mathematics Is Locked Down

Immortal Master, you ask me to calculate an area while drawing a formation, and you think pi equals three? Fairy, you cast ranged spells without accounting for gravitational acceleration? Divine Lord, you're carving a right triangle into a magic artifact, and you don't know the Pythagorean theorem? Dao Lord, you have a spherical artifact, but can't calculate its volume? My dear, you want to break into this cave abode, but you don't know calculus? I transmigrated here just to save this godawful standard of mathematics? Sorry, I'm going to get a head start on the path to immortality!