Why are numbers in Arabic (not Arabic numerals) written from left to right when the language is written from right to left?

Question

Or maybe the question should be why are (Western) Arabic numerals (i.e., 1, 2, 3…) written from left to right?

My question is why is 125 written ١٢٥ and not ٥٢١

In: 38

Answer 1

Arabs wrote numbers that way because it was easier for counting and trading.with India which already has numeral written left to right.

This system was later passed on to the western world through trade and exchanging ideas.