###Human: Greg's PPO algorithm obtained 90% of the possible reward on the CoinRun environment. CoinRun's maximum reward is half as much as the maximum ProcGen reward of 240. How much reward did Greg's PPO algorithm get?, ### Assistant: Half of much as ProcGen's maximum reward is 240/2=120 reward
90% of CoinRun's maximum reward is 120*.9=108 reward 
 So the answer is :  108