Alright, let's work through 6129 times 9004 step by step
6129 × 9004 = 9004 × (6129)
+ 9004 × 9 giving us 81036
+ 9004 × 20 that equals 180080
+ 9004 × 100 what gives us 900400
+ 9004 × 6000 yielding 54024000

= 55185516
