Alright, let's work through 47522690 times 81248609 step by step
47522690 × 81248609 = 81248609 × (47522690)
+ 81248609 × 0 yielding 0
+ 81248609 × 90 producing 7312374810
+ 81248609 × 600 yielding 48749165400
+ 81248609 × 2000 producing 162497218000
+ 81248609 × 20000 which equals 1624972180000
+ 81248609 × 500000 that equals 40624304500000
+ 81248609 × 7000000 yielding 568740263000000
+ 81248609 × 40000000 producing 3249944360000000

= 3861152458438210
