Prototype:
https://www.figma.com/proto/MEge1lSWaB3ncC3K5z09cd/Day4_Calculator31%2F12%2F23?type=design&node-id=5-385&t=pVaXqgf0C5XNfbM7-1&scaling=scale-down&page-id=0%3A1&mode=design
