Alright, let's work through 10509111 times 12710065 step by step
10509111 × 12710065 = 12710065 × (10509111)
+ 12710065 × 1 what gives us 12710065
+ 12710065 × 10 that results in 127100650
+ 12710065 × 100 that is equal 1271006500
+ 12710065 × 9000 yielding 114390585000
+ 12710065 × 00000 that results in 0
+ 12710065 × 500000 producing 6355032500000
+ 12710065 × 0000000 resulting in 0
+ 12710065 × 10000000 what gives us 127100650000000

= 133571483902215
