Alright, let's work through 7800 times 9510 step by step
7800 × 9510 = 9510 × (7800)
+ 9510 × 0 resulting in 0
+ 9510 × 00 resulting in 0
+ 9510 × 800 yielding 7608000
+ 9510 × 7000 giving us 66570000

= 74178000
