Alright, let's work through 21993043 times 76317721 step by step
21993043 × 76317721 = 76317721 × (21993043)
+ 76317721 × 3 that is equal 228953163
+ 76317721 × 40 that equals 3052708840
+ 76317721 × 000 what gives us 0
+ 76317721 × 3000 what gives us 228953163000
+ 76317721 × 90000 giving us 6868594890000
+ 76317721 × 900000 that equals 68685948900000
+ 76317721 × 1000000 resulting in 76317721000000
+ 76317721 × 20000000 what gives us 1526354420000000

= 1678458919615003
