Alright, let's work through 398242 times 6274443 step by step
398242 × 6274443 = 6274443 × (398242)
+ 6274443 × 2 that is equal 12548886
+ 6274443 × 40 that equals 250977720
+ 6274443 × 200 yielding 1254888600
+ 6274443 × 8000 resulting in 50195544000
+ 6274443 × 90000 giving us 564699870000
+ 6274443 × 300000 that results in 1882332900000

= 2498746729206
