Calculators are invaluable tools when working with long equations and involved calculations.
What you can do in a few seconds on your calculator now would have taken a chemistry student 20 years ago several minutes to do by hand. Even with this greater potential speed in problem solving, you have to set up the equations before you use the calculator. Besides writing the equations down on paper, you may have to rearrange them so that you can use your calculator's functions to solve the problem. You will need to become acquainted with your calculator so you will know how to properly set up the problem. You will also deal with exponential notation in many of these problems.