Alright, let's work through 39981094 times 99036743 step by step
39981094 × 99036743 = 99036743 × (39981094)
+ 99036743 × 4 that results in 396146972
+ 99036743 × 90 that is equal 8913306870
+ 99036743 × 000 producing 0
+ 99036743 × 1000 producing 99036743000
+ 99036743 × 80000 what gives us 7922939440000
+ 99036743 × 900000 that equals 89133068700000
+ 99036743 × 9000000 that is equal 891330687000000
+ 99036743 × 30000000 producing 2971102290000000

= 3959597331336842
