<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 the concept of compound interest? Context: Compound interest is calculated on the initial principal along with the accumulated interest from previous periods on a deposit or loan. Answer: [/INST]Compound interest is the interest calculated on the initial principal, which also includes all of the accumulated interest from previous periods on a deposit or loan.</s>