<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is compound interest? Context: Compound interest is calculated on the initial principal and also on the accumulated interest from previous periods. Answer: [/INST]Compound interest is the interest calculated on the initial principal and also on the accumulated interest of previous periods.</s>