Alright, let's work through 20020680 times 8377821 step by step
20020680 × 8377821 = 8377821 × (20020680)
+ 8377821 × 0 that equals 0
+ 8377821 × 80 yielding 670225680
+ 8377821 × 600 that is equal 5026692600
+ 8377821 × 0000 resulting in 0
+ 8377821 × 20000 that results in 167556420000
+ 8377821 × 000000 giving us 0
+ 8377821 × 0000000 that results in 0
+ 8377821 × 20000000 that equals 167556420000000

= 167729673338280
