as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
make a list of the top 5 most populous cities in the world and include their population.
user
the top 5 most populous cities in the world are: 
1. tokyo, japan: 37 million
2. delhi, india: 29 million
3. shanghai, china: 26 million
4. mexico city, mexico: 22 million
5. são paulo, brazil: 21 million
assistant