Alright, let's work through 3139 times 4165 step by step
3139 × 4165 = 4165 × (3139)
+ 4165 × 9 that equals 37485
+ 4165 × 30 yielding 124950
+ 4165 × 100 giving us 416500
+ 4165 × 3000 what gives us 12495000

= 13073935
