 
 <prompt> Julian nwere 400 legos na e kwesịrị ike iji meka ego nke abụọ airplane dị iche iche. Ọ bụghị ego nke Julian chọrọ? <response>: Two aeroplanes require 240 legos/airplane x 2 airplanes = 480 legos.
Julian needs 480 legos - 400 legos = 80 more legos

The answer will be 80. 