Dippey

Now try and work this out

Capacity

747-400 - Flightcrew of two. Typical three class seating for 416 (23 first, 78 business and 315 economy class pax). Cargo hold 170.5m3 (6025cuft) or 151m3 (5332cuft).
747-400 Domestic - Two class seating for 568 (24 first and 544 economy).
747-400 Combi - Typical arrangement for six or seven pallets and 266 three class passengers.
747-400ER - Same as -400, but cargo hold 158.6m3 (5599cuft) or 137m3 (4837cuft).
747-400F - 30 pallets on the main deck and 32 LD1 containers in the lower hold.


Weights

747-400 - Standard operating empty with PW-4056s 180,985kg (399,000lb), with CF6-80-C2B1Fs 180,755kg (398,500lb), with RB-211s 181,755kg (400,700lb); operating weights at optional MTOW with PW-4056s 181,485kg (400,100lb), with CF6-80-C2B1Fs 181,255kg (399,600lb), with RB-211s 182,255kg (401,800lb). Max takeoff 362,875kg (800,000lb), or optionally 377,845kg (833,000lb), or 385,555kg (850,000lb), or 396,895kg (875,000lb).
747-400ER/ERF - MTOW 412,770kg (910,000lb).


In short, no wonder your plane never gets of the ground!!!!!
Dipps