Alright, let's work through 34251254 times 20671992 step by step
34251254 × 20671992 = 20671992 × (34251254)
+ 20671992 × 4 producing 82687968
+ 20671992 × 50 that equals 1033599600
+ 20671992 × 200 which equals 4134398400
+ 20671992 × 1000 which equals 20671992000
+ 20671992 × 50000 which equals 1033599600000
+ 20671992 × 200000 yielding 4134398400000
+ 20671992 × 4000000 that results in 82687968000000
+ 20671992 × 30000000 what gives us 620159760000000

= 708041648677968
