Alright, let's work through 3791 times 5402 step by step
3791 × 5402 = 5402 × (3791)
+ 5402 × 1 that results in 5402
+ 5402 × 90 what gives us 486180
+ 5402 × 700 producing 3781400
+ 5402 × 3000 what gives us 16206000

= 20478982
