Alright, let's work through 8545 times 7790 step by step
8545 × 7790 = 7790 × (8545)
+ 7790 × 5 giving us 38950
+ 7790 × 40 that equals 311600
+ 7790 × 500 that equals 3895000
+ 7790 × 8000 giving us 62320000

= 66565550
