Daily UI 004 - Calculator

For this one I had only one thought : I could have done a pretty fun design, or original, or even a futuristic design. But I think that sometimes we have to stay SIMPLE, BASIC. Why should I revolutionize the design of an application on which you're just going to do 9+7 (Come on, we all use the calculator for this kind of calculation, don't lie !)⁠ ⁠ My choice for this challenge : Keep it simple.⁠