It actually depends on the length on the words. Sometimes we use very long words too often in a document which can make 800 words up to 3 pages. However, Generally, 800 words in Times New Roman and 12Pt are 2 Pages(full) only. I did it before typing my answer here and It was two pages full in all three times. I used one of my blurtit answer which was approximately 300+ words and pasted it and typed more at its end and result came up to 800 pages using your requirements.