Alright, let's work through 8145 times 2513 step by step
8145 × 2513 = 2513 × (8145)
+ 2513 × 5 that equals 12565
+ 2513 × 40 that is equal 100520
+ 2513 × 100 that results in 251300
+ 2513 × 8000 yielding 20104000

= 20468385
