An investment yields an interest payment of $231 each month

An investment yields an interest payment of $231 each month. If the simple annual interest rate is 9%, what is the amount of the investment?

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 #64952