Alright, let's work through 1705 times 7929 step by step
1705 × 7929 = 7929 × (1705)
+ 7929 × 5 yielding 39645
+ 7929 × 00 yielding 0
+ 7929 × 700 yielding 5550300
+ 7929 × 1000 producing 7929000

= 13518945
