Alright, let's work through 20406028 times 40617740 step by step
20406028 × 40617740 = 40617740 × (20406028)
+ 40617740 × 8 that is equal 324941920
+ 40617740 × 20 which equals 812354800
+ 40617740 × 000 that results in 0
+ 40617740 × 6000 yielding 243706440000
+ 40617740 × 00000 yielding 0
+ 40617740 × 400000 that is equal 16247096000000
+ 40617740 × 0000000 producing 0
+ 40617740 × 20000000 producing 812354800000000

= 828846739736720
