No problem, we've got 84420323 and 65216336 to multiply
84420323 × 65216336 = 65216336 × (84420323)
+ 65216336 × 3 which equals 195649008
+ 65216336 × 20 producing 1304326720
+ 65216336 × 300 which equals 19564900800
+ 65216336 × 0000 what gives us 0
+ 65216336 × 20000 that equals 1304326720000
+ 65216336 × 400000 what gives us 26086534400000
+ 65216336 × 4000000 which equals 260865344000000
+ 65216336 × 80000000 yielding 5217306880000000

= 5505584149996528
