Alright, let's work through 2658 times 5142 step by step
2658 × 5142 = 5142 × (2658)
+ 5142 × 8 which equals 41136
+ 5142 × 50 yielding 257100
+ 5142 × 600 which equals 3085200
+ 5142 × 2000 giving us 10284000

= 13667436
