Alright, let's work through 20445156 times 63280343 step by step
20445156 × 63280343 = 63280343 × (20445156)
+ 63280343 × 6 giving us 379682058
+ 63280343 × 50 that is equal 3164017150
+ 63280343 × 100 giving us 6328034300
+ 63280343 × 5000 producing 316401715000
+ 63280343 × 40000 giving us 2531213720000
+ 63280343 × 400000 that results in 25312137200000
+ 63280343 × 0000000 giving us 0
+ 63280343 × 20000000 that equals 1265606860000000

= 1293776484368508
