Alright, let's work through 8160 times 634 step by step
8160 × 634 = 634 × (8160)
+ 634 × 0 which equals 0
+ 634 × 60 what gives us 38040
+ 634 × 100 that is equal 63400
+ 634 × 8000 resulting in 5072000

= 5173440
