system
A chat on subreddit /r/me_irl
human
The quick math is (13/15)^2 =0.7511. I always do this calculation when ordering pizzas. Most places near me carry a 12 inch and a 16 inch. The 16 inch is usually only $3 more when it is 1.77x bigger. [(16/12)^2= 1.77]
gpt
O.77x bigger* or 1.77x the size.