It seems like you're asking for a value of \( R \) based on a given value of \( C \), but I need more information about the relationship between \( R \) and \( C \).
Could you provide additional context or a specific formula that relates \( R \) and \( C \)? For example, are you looking for something related to resistance \( (R) \) and capacitance \( (C) \) in electronics, or is this a different context?