How many episodes does the original 1990s Sailor Moon anime have?

How to get close to this number

Five seasons at roughly forty episodes each gives two hundred, and that is the answer almost exactly. For a weekly series, seasons-times-episodes-per-season is the natural decomposition, and the per-season figure for a long-running Japanese show is close to a full year of weekly broadcast rather than the shorter western season.

The western instinct is to assume a season is around twenty episodes, which would land you at half the true figure. Season lengths are a regional production convention, not a universal, and mixing them up is the single most common error in questions comparing television across countries.

The reboot in the explanation makes the same point as several other anime questions here: the same story exists at two very different lengths. A shorter, more source-faithful retelling covers the material in a fraction of the episodes, which is a direct measure of how much of the original run was weekly-format padding rather than story.