Alright, let's work through 7801 times 3128 step by step
7801 × 3128 = 3128 × (7801)
+ 3128 × 1 yielding 3128
+ 3128 × 00 that is equal 0
+ 3128 × 800 giving us 2502400
+ 3128 × 7000 yielding 21896000

= 24401528
