Let’s face it: Over the years, those carefully memorized multiplication tables start to slip out of your brain. So calculators, once fiercely banned by teachers, come in awfully handy.
But who needs a separate physical calculator when you can calculate any sums via the calculators found on the internet or on your smartphone? These days, you can even ask smart speakers, such as the Amazon Echo, to solve a math problem for you. Alexa, sum it up!