Calculator screen showing number 0 to 9 and common functions such as addition, subtraction, etc. The screen shows the current total as well as previous calculations

Mockup of an iPhone 6 on a pink background, with a calculator screen mockup inside of it

Design a calculator. Standard, scientific, or specialty calculator for something such as a mortgage? Is it for a phone, a tablet, a web app? (It's up to you!

 

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