Alright, let's work through 5157 times 394 step by step
5157 × 394 = 394 × (5157)
+ 394 × 7 giving us 2758
+ 394 × 50 that is equal 19700
+ 394 × 100 which equals 39400
+ 394 × 5000 what gives us 1970000

= 2031858
