Could Sainsbury's buy Tesco?
Think slowly and carefully, before giving your answer.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Sainsbury is a business worth £29.007 billion in 2019. Tesco is a business worth £63.911 billion in 2019. 63 billion is more than 29 billion. A business needs to have enough revenue to buy another business.
So, the answer is no.