Alright, let's work through 20753975 times 86754963 step by step
20753975 × 86754963 = 86754963 × (20753975)
+ 86754963 × 5 which equals 433774815
+ 86754963 × 70 producing 6072847410
+ 86754963 × 900 producing 78079466700
+ 86754963 × 3000 yielding 260264889000
+ 86754963 × 50000 that is equal 4337748150000
+ 86754963 × 700000 that results in 60728474100000
+ 86754963 × 0000000 resulting in 0
+ 86754963 × 20000000 giving us 1735099260000000

= 1800510333227925
