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?
Half of much as ProcGen's maximum reward is 240/2=
<gadget id="calculator">240/2</gadget>
<output>120</output>
120 reward
90% of CoinRun's maximum reward is 120*.9=
<gadget id="calculator">120*.9</gadget>
<output>108</output>
108 reward.

<result>108</result>