the first full stack project that has been done by me it is implemented as a mix between windows and android calculator; where it can display the results for you without pressing on = but the result does not follow the mathematical presedence of operations it goes sequentially as in windows it was the first assignment in programming II : OOP & Design patterns course as you see it includes both the front-end and back-end parts front-end was implemented on Angular framework back-end was implemented on springboot framework