Alright, let's work through 8935 times 9129 step by step
8935 × 9129 = 9129 × (8935)
+ 9129 × 5 producing 45645
+ 9129 × 30 that is equal 273870
+ 9129 × 900 that is equal 8216100
+ 9129 × 8000 that results in 73032000

= 81567615
