Alright, let's work through 396825 times 42243926 step by step
396825 × 42243926 = 42243926 × (396825)
+ 42243926 × 5 that is equal 211219630
+ 42243926 × 20 that equals 844878520
+ 42243926 × 800 what gives us 33795140800
+ 42243926 × 6000 resulting in 253463556000
+ 42243926 × 90000 what gives us 3801953340000
+ 42243926 × 300000 that equals 12673177800000

= 16763445934950
