Alright, let's work through 5088 times 6129 step by step
5088 × 6129 = 6129 × (5088)
+ 6129 × 8 which equals 49032
+ 6129 × 80 giving us 490320
+ 6129 × 000 that is equal 0
+ 6129 × 5000 that is equal 30645000

= 31184352
