Alright, let's work through 6604 times 1787 step by step
6604 × 1787 = 1787 × (6604)
+ 1787 × 4 yielding 7148
+ 1787 × 00 what gives us 0
+ 1787 × 600 what gives us 1072200
+ 1787 × 6000 producing 10722000

= 11801348
