Alright, let's work through 6604 times 5262 step by step
6604 × 5262 = 5262 × (6604)
+ 5262 × 4 yielding 21048
+ 5262 × 00 yielding 0
+ 5262 × 600 yielding 3157200
+ 5262 × 6000 yielding 31572000

= 34750248
