I am relatively new to the concept of aircraft engine. While going through the Turboprop engine design, i read that most of the energy of the exhaust gases are used to drive the propeller blades. How is it done ? Because i find the design of turboprop engine and gas turbine engine pretty similar except in turboprop, there is propeller and a gearbox put forward. If i am not wrong there is turbine placed at the end of gas turbine engine and also in turboprop. While in a gas-turbine engine, the exhaust gases produce the thrust, while in a turbo prop how does the same turbine work in different way to harness the same energy of the exhaust gases to run the propeller. Please kindly explain me in a simple way if possible as i am relatively a starter to this concept.