SI = (P * R * T) / 100 = (4000 * 5 * 1.5) / 100 = 40 * 7.5 = ₹300.
साधारण ब्याज = (P * R * T) / 100 = (4000 * 5 * 1.5) / 100 = 40 * 7.5 = ₹300।