How can a roughly rectangular piece of wreckage 20 metres by 22 metres fit into a B777 with a fuselage diameter of 6 metres?
Maximum width you can get from a cylinder (excluding deformation) is its circumference (obtained by slicing along the long axis, then opening up flat).
Diameter is (I think) 6.19m, so circumference and hence max width of a piece of fuselage itself is 2 * pi * r = 19.45m