After decreasing 90% in the price of an article costs Rs.320

After decreasing 90% in the price of an article costs Rs.320. Find the actual cost of an article?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #757