Give the step-by-step reasoning process and then the final answer. Mark is reading books, for 2 hours each day. He decided to increase his time spent on reading books weekly, by 4 hours. How much time does Mark want to spend during one week on reading books?
Currently, Mark is reading books for 2 * 7 = 14 hours weekly. His goal is to read books, for 14 + 4 = 18 hours during one week.
The final answer: 18.