Alright, let's work through 8701713 times 86086025 step by step
8701713 × 86086025 = 86086025 × (8701713)
+ 86086025 × 3 resulting in 258258075
+ 86086025 × 10 resulting in 860860250
+ 86086025 × 700 resulting in 60260217500
+ 86086025 × 1000 that equals 86086025000
+ 86086025 × 00000 giving us 0
+ 86086025 × 700000 that results in 60260217500000
+ 86086025 × 8000000 that equals 688688200000000

= 749095882860825
