This was such an important take-away of this course I emphatically desired for you to know that I taught it twice. Once in S1 and then finally Q4 assignment #10, which included an instructional video on how to build the spreadsheet for the problem.
You save $75/week to your 401k, every week of the year, except when you have a 2 week vacation. You do so for 40 years, and over that time span average
6.6% on your returns. Your employer matches you dollar-for-dollar.
How much will you have in your 401k account in 40 years?