Alright, let's work through 20308481 times 74020245 step by step
20308481 × 74020245 = 74020245 × (20308481)
+ 74020245 × 1 that results in 74020245
+ 74020245 × 80 what gives us 5921619600
+ 74020245 × 400 producing 29608098000
+ 74020245 × 8000 yielding 592161960000
+ 74020245 × 00000 that results in 0
+ 74020245 × 300000 that is equal 22206073500000
+ 74020245 × 0000000 that is equal 0
+ 74020245 × 20000000 which equals 1480404900000000

= 1503238739197845
