 
<translate> Ụgbọelu abụọ chọrọ 240 legos / ụgbọelu x 2 ụgbọelu = 480 legos. Julian chọrọ 480 legos - 400 legos = 80 legos ọzọ. N'ihi ya, azịza ya bụ 80. <eng> Two aeroplanes require 240 legos / airplane x 2 airplanes = 480 legos. Julian needs 480 legos - 400 legos = 80 more legos.
Thus, the answer is 80. 