Alright, let's work through 21219818 times 74678949 step by step
21219818 × 74678949 = 74678949 × (21219818)
+ 74678949 × 8 that results in 597431592
+ 74678949 × 10 yielding 746789490
+ 74678949 × 800 which equals 59743159200
+ 74678949 × 9000 that results in 672110541000
+ 74678949 × 10000 which equals 746789490000
+ 74678949 × 200000 what gives us 14935789800000
+ 74678949 × 1000000 yielding 74678949000000
+ 74678949 × 20000000 what gives us 1493578980000000

= 1584673706211282
