Alright, let's work through 20310891 times 69132197 step by step
20310891 × 69132197 = 69132197 × (20310891)
+ 69132197 × 1 that results in 69132197
+ 69132197 × 90 that is equal 6221897730
+ 69132197 × 800 that results in 55305757600
+ 69132197 × 0000 which equals 0
+ 69132197 × 10000 that equals 691321970000
+ 69132197 × 300000 giving us 20739659100000
+ 69132197 × 0000000 yielding 0
+ 69132197 × 20000000 which equals 1382643940000000

= 1404136517857527
