Alright, let's work through 20572348 times 671370 step by step
20572348 × 671370 = 671370 × (20572348)
+ 671370 × 8 resulting in 5370960
+ 671370 × 40 resulting in 26854800
+ 671370 × 300 producing 201411000
+ 671370 × 2000 producing 1342740000
+ 671370 × 70000 producing 46995900000
+ 671370 × 500000 producing 335685000000
+ 671370 × 0000000 giving us 0
+ 671370 × 20000000 which equals 13427400000000

= 13811657276760
