Floating Math Point: The Phantom Menace of Precision

$$0.1 + 0.2 = 0.30000000000000004$$Hear me out. Try doing 0.1 + 0.2 in your browser console and prepare for the unexpected. Why is the result 0.30000000000000004? Have I been deceived my entire life? Should I even trust my math teachers anymore? This...