Find the principle on a certain sum of money at 5% per…

Find the principle on a certain sum of money at 5% per annum for 3 1/5 years if the amount being Rs.870?

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 #26508