How to square any number with 0 in the middle in less than 3 seconds! | Easy and fast math trick

In this video, I show you a really easy 3-step math trick on how to square any number with a 0 in the middle. When I first heard of this trick, my mind was blown and hopefully yours will be too with this video! This is a really useful trick, so make sure to subscribe for more interesting videos!

Answers to the homework:
406^2 = 164836
707^2 = 499849
208^2 = 43264
1109^2 = 1229881