Alright, let's work through 4087 times 8177 step by step
4087 × 8177 = 8177 × (4087)
+ 8177 × 7 resulting in 57239
+ 8177 × 80 what gives us 654160
+ 8177 × 000 resulting in 0
+ 8177 × 4000 which equals 32708000

= 33419399
