Alright, let's work through 40397350 times 99334271 step by step
40397350 × 99334271 = 99334271 × (40397350)
+ 99334271 × 0 what gives us 0
+ 99334271 × 50 that equals 4966713550
+ 99334271 × 300 resulting in 29800281300
+ 99334271 × 7000 that results in 695339897000
+ 99334271 × 90000 that results in 8940084390000
+ 99334271 × 300000 that results in 29800281300000
+ 99334271 × 0000000 producing 0
+ 99334271 × 40000000 which equals 3973370840000000

= 4012841312581850
