Alright, let's work through 20026641 times 53207797 step by step
20026641 × 53207797 = 53207797 × (20026641)
+ 53207797 × 1 resulting in 53207797
+ 53207797 × 40 that results in 2128311880
+ 53207797 × 600 what gives us 31924678200
+ 53207797 × 6000 that is equal 319246782000
+ 53207797 × 20000 that results in 1064155940000
+ 53207797 × 000000 that results in 0
+ 53207797 × 0000000 giving us 0
+ 53207797 × 20000000 what gives us 1064155940000000

= 1065573448919877
