Yes, it is possible to calculate rewards in a situation where it is more difficult. The key is to focus on the desired outcome, rather than the difficulty of the process. For example, you can break down the process into smaller, more manageable steps, and measure progress towards the desired outcome in each step. This allows you to track progress and reward yourself for the progress made, even if the overall process is more difficult. Additionally, you can set smaller goals along the way to help keep yourself motivated and on track. This can help to make the process more manageable and rewarding, even when it is more difficult.