Ireally need the correct answer i'll give 40 points and the brainiest plzz no incorrect answers

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.