Alright, let's work through 7755 times 5475 step by step
7755 × 5475 = 5475 × (7755)
+ 5475 × 5 which equals 27375
+ 5475 × 50 which equals 273750
+ 5475 × 700 which equals 3832500
+ 5475 × 7000 yielding 38325000

= 42458625
