No problem, we've got 83991703 and 47425536 to multiply
83991703 × 47425536 = 47425536 × (83991703)
+ 47425536 × 3 which equals 142276608
+ 47425536 × 00 that results in 0
+ 47425536 × 700 yielding 33197875200
+ 47425536 × 1000 which equals 47425536000
+ 47425536 × 90000 what gives us 4268298240000
+ 47425536 × 900000 that is equal 42682982400000
+ 47425536 × 3000000 producing 142276608000000
+ 47425536 × 80000000 yielding 3794042880000000

= 3983351534327808
