I think it's how the shading goes all the way to x=5.
22.25
multiply them by each other and you will get your answer 22.25
Hope this helpssssssssssss
Https://www.algebra.com/cgi-bin/plot-formula.mpl?expression=%28%28n%5E%281%2F3%29%29%5E12%29=n%5E%2812%2F3%29=n%5E4&x=0003