A calculator was once a necessity in any math class above elementary school. But now that smartphones are ubiquitous, everyone has a ready-to-go calculator right in their pocket. Of course, it’s not a ...

Most people can’t do compound interest calculations in their head. But understanding exactly how quickly your money is growing (or shrinking) over time is crucial when you’re developing your financial ...

Back in my previous life, I was a finance guy—that’s what my undergraduate degree is in, and that’s how I made my living for many years. Through it all, one particular piece of gear was always at my ...

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