A cargo plane carries various packages. The plane carries 500 pounds of cargo initially. During the flight, it drops off packages at multiple stops. At the first stop, it drops off 1/4 of its initial cargo weight. At the second stop, it drops off 1/3 of the remaining cargo weight. If the plane carries 200 pounds of cargo after the second stop, what was the weight of the cargo dropped off at the second stop? Let's think step by step and output the final answer within \boxed{}.
user