Julian has 400 legos and wants to make lego models of two identical airplanes. If each airplane model requires 240 legos, how many more legos does Julian need?
Two aeroplanes require 240 legos/airplane x 2 airplanes = <<240*2=480>>480 legos.
Julian needs 480 legos - 400 legos = <<480-400=80>>80 more legos
#### 80