total_cards = 52
kings = 4
face_cards = 12 # Jacks, Queens, Kings: 4 of each
p_a_and_b = kings / total_cards # P(King AND Face card) = P(King), since every king is a face card
p_b = face_cards / total_cards # P(Face card)
p_a_given_b = p_a_and_b / p_b
print(f"P(King | Face card) = {p_a_given_b:.4f}") # 0.3333