/// Modul Gas
/// Gas Module
/// Menghitung tekanan gas ideal (P) berdasarkan jumlah mol (n), konstanta gas (R), suhu (T), dan volume (V) menggunakan Hukum Gas Ideal: PV = nRT.
/// Calculates ideal gas pressure (P) from number of moles (n), gas constant (R), temperature (T), and volume (V) using the Ideal Gas Law: PV = nRT.
/// Rumus: P = (n × R × T) / V
/// Formula: P = (n × R × T) / V