Alright, let's work through 20510504 times 6517095 step by step
20510504 × 6517095 = 6517095 × (20510504)
+ 6517095 × 4 producing 26068380
+ 6517095 × 00 that equals 0
+ 6517095 × 500 that results in 3258547500
+ 6517095 × 0000 what gives us 0
+ 6517095 × 10000 that results in 65170950000
+ 6517095 × 500000 resulting in 3258547500000
+ 6517095 × 0000000 that equals 0
+ 6517095 × 20000000 that results in 130341900000000

= 133668903065880
