Alright, let's work through 2528 times 7791 step by step
2528 × 7791 = 7791 × (2528)
+ 7791 × 8 that equals 62328
+ 7791 × 20 giving us 155820
+ 7791 × 500 resulting in 3895500
+ 7791 × 2000 that equals 15582000

= 19695648
