Alright, let's work through 39999961 times 99033436 step by step
39999961 × 99033436 = 99033436 × (39999961)
+ 99033436 × 1 producing 99033436
+ 99033436 × 60 that results in 5942006160
+ 99033436 × 900 producing 89130092400
+ 99033436 × 9000 giving us 891300924000
+ 99033436 × 90000 that is equal 8913009240000
+ 99033436 × 900000 that is equal 89130092400000
+ 99033436 × 9000000 yielding 891300924000000
+ 99033436 × 30000000 which equals 2971003080000000

= 3961333577695996
