At equilibrium, an aqueous solution of formic acid (HCHO₂) has these concentrations:
[H⁺] = 0.0023 M
[CHO₂⁻] = 0.0023 M
[HCHO₂] = 0.0294 M
HCHO₂(aq) ⇌ H⁺(aq) + CHO₂⁻(aq)

What is the value of K of this equilibrium?