Alright, let's work through 8728 times 1913 step by step
8728 × 1913 = 1913 × (8728)
+ 1913 × 8 that equals 15304
+ 1913 × 20 that is equal 38260
+ 1913 × 700 that equals 1339100
+ 1913 × 8000 yielding 15304000

= 16696664
