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

Actually Arabs didn’t create the modern decimal system, it was Indians who did it and arabs and persian traded with India from ancient times so they also started to use decimal numeric system as it was easier, then the decimal system was bought to Europe by Arabs and it was called hindu-arabic numeric system because it was bought by arabs and arabs and Persians called Indians as hindu.