This Car Insurance Cost Calculator uses the mathematical formula CI = 133 × (CV/25000 + 35/A) to estimate monthly insurance premiums. The calculator considers two primary factors: car value (CV) and driver age (A). The formula reflects typical insurance pricing where premiums increase with higher car values and decrease with higher age. The tool provides bidirectional calculations, allowing users to solve for any variable when the other two are known. This implementation includes input validation and error handling to ensure mathematically sound results.

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