Alright, let's work through 3957 times 5294 step by step
3957 × 5294 = 5294 × (3957)
+ 5294 × 7 that results in 37058
+ 5294 × 50 giving us 264700
+ 5294 × 900 yielding 4764600
+ 5294 × 3000 resulting in 15882000

= 20948358
