Alright, let's work through 7886 times 557 step by step
7886 × 557 = 557 × (7886)
+ 557 × 6 giving us 3342
+ 557 × 80 producing 44560
+ 557 × 800 resulting in 445600
+ 557 × 7000 which equals 3899000

= 4392502
