Why do a banker use spreadsheets?

Calculations and finance are integral to banking. Spreadsheets provide a way of doing all sorts of calculations and have many specialised functions specifically for finances. There are ones to do with loans and interest rates and repayments and others. Rather than trying to work things out on paper and risk making errors, bankers can use the financial functions in a spreadsheet and its many other facilities in doing their work. It is amongst the most important and useful pieces of software that bankers use.