Behind the shot

I decided to skip the third day prompt and work on the fourth day because it seemed more interesting to me. Learnt a bit about the history of calculator design, why numbers are always in 3 by 3+1 layout, operations on right, etc.

CALC master is a pro calculator. It provides more than just the basic operations to the user. It follows skeuomorphic style of design to give the user realistic feel of a calculator. It also remembers the past calculations and provides actions such as copy and delete.