Learning how to do this is actually very important because you will use this often in math. Though we usually use the button as shown in the picture (i circled it in red) rather than exp. I have shown how to type out a number by the side so you can take a look at it and learn how to use it. If you follow the instructions on how to key in the equation into the calculator given by the questions you should be able to easily get the answer so do give it a try! :)