Alright, let's work through 28061943 times 36643389 step by step
28061943 × 36643389 = 36643389 × (28061943)
+ 36643389 × 3 that equals 109930167
+ 36643389 × 40 which equals 1465735560
+ 36643389 × 900 producing 32979050100
+ 36643389 × 1000 producing 36643389000
+ 36643389 × 60000 resulting in 2198603340000
+ 36643389 × 000000 which equals 0
+ 36643389 × 8000000 producing 293147112000000
+ 36643389 × 20000000 that results in 732867780000000

= 1028284693444827
