Alright, let's work through 7800 times 9647 step by step
7800 × 9647 = 9647 × (7800)
+ 9647 × 0 resulting in 0
+ 9647 × 00 what gives us 0
+ 9647 × 800 what gives us 7717600
+ 9647 × 7000 yielding 67529000

= 75246600
