Alright, let's work through 13155579 times 79509620 step by step
13155579 × 79509620 = 79509620 × (13155579)
+ 79509620 × 9 resulting in 715586580
+ 79509620 × 70 that equals 5565673400
+ 79509620 × 500 that results in 39754810000
+ 79509620 × 5000 which equals 397548100000
+ 79509620 × 50000 which equals 3975481000000
+ 79509620 × 100000 what gives us 7950962000000
+ 79509620 × 3000000 that is equal 238528860000000
+ 79509620 × 10000000 which equals 795096200000000

= 1045995087169980
