1. The problem is to understand how to find a musical note. 2. A musical note corresponds to a specific frequency of sound waves. 3. The formula to find the frequency of a note in the equal temperament scale is: $$f = f_0 \times 2^{\frac{n}{12}}$$ where $f_0$ is the reference frequency (usually A4 = 440 Hz), and $n$ is the number of semitones away from the reference note. 4. For example, to find the frequency of C5, which is 3 semitones above A4, calculate: $$f = 440 \times 2^{\frac{3}{12}} = 440 \times 2^{0.25} \approx 440 \times 1.1892 = 523.25 \text{ Hz}$$ 5. This means C5 has a frequency of approximately 523.25 Hz. 6. To find any note, count the semitones difference from the reference note and apply the formula. 7. This method helps in tuning instruments and understanding musical pitch scientifically.