Daily UI - Day 004: Calculator

I chose to design a calculator for students, optimized to help them solve basic algebra. I first begin by studying other calculators (Iphone calculator, Google calculator, my old calculator from school, etc) to decide which buttons I will include in my design.

Although I follow the conventional design pretty closely (I believe it has been somewhat optimized), I made the followings alterations to serve the needs of my specific group of users:

- Brackets ( ): enable more complicated functions
- Calculation history: show the steps users took to arrive at the final resutls
- UI: I intend to recreate the black board, white chalk look of the class room.