Alright, let's work through 4131 times 9690 step by step
4131 × 9690 = 9690 × (4131)
+ 9690 × 1 that equals 9690
+ 9690 × 30 which equals 290700
+ 9690 × 100 that is equal 969000
+ 9690 × 4000 that equals 38760000

= 40029390
