No problem, we've got 71023787 and 80089160 to multiply
71023787 × 80089160 = 80089160 × (71023787)
+ 80089160 × 7 which equals 560624120
+ 80089160 × 80 resulting in 6407132800
+ 80089160 × 700 which equals 56062412000
+ 80089160 × 3000 yielding 240267480000
+ 80089160 × 20000 giving us 1601783200000
+ 80089160 × 000000 that equals 0
+ 80089160 × 1000000 resulting in 80089160000000
+ 80089160 × 70000000 giving us 5606241200000000

= 5688235440848920
