NPR's Ailsa Chang speaks to mathematician Eugenia Cheng about the Pascaline -- a 17th-century invention credited as the first mechanical calculator.

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The calculator on your Apple devices can do more than add, subtract, multiply and divide. Here's how it can help you with all kinds of math problems.

"Return on investment" is a financial calculation used to gauge how well the money you invest earns you even more money. To calculate ROI you divide the earnings you made from an investment by the ...

Personal loan: If you are planning to take a personal loan from a bank, an NBFC or a fintech platform, it is advisable to use a personal loan EMI calculator to check the monthly instalment based on ...

We calculate this based on a simple income multiple, but, in reality, it's much more complex. When you apply for a mortgage, lenders calculate how much they'll lend based on both your income and your ...

Calculate dividends by subtracting year-end retained earnings from start-year retained earnings, then net income. Dividend payout ratio (DPR) is found by dividing total dividends by net income to ...