Alright, let's work through 7831 times 5477 step by step
7831 × 5477 = 5477 × (7831)
+ 5477 × 1 which equals 5477
+ 5477 × 30 that is equal 164310
+ 5477 × 800 which equals 4381600
+ 5477 × 7000 which equals 38339000

= 42890387
