No problem, we've got 82122718 and 81121024 to multiply
82122718 × 81121024 = 81121024 × (82122718)
+ 81121024 × 8 yielding 648968192
+ 81121024 × 10 what gives us 811210240
+ 81121024 × 700 resulting in 56784716800
+ 81121024 × 2000 that equals 162242048000
+ 81121024 × 20000 yielding 1622420480000
+ 81121024 × 100000 that is equal 8112102400000
+ 81121024 × 2000000 that equals 162242048000000
+ 81121024 × 80000000 resulting in 6489681920000000

= 6661878977823232
