Alright, let's work through 6455 times 6518 step by step
6455 × 6518 = 6518 × (6455)
+ 6518 × 5 that results in 32590
+ 6518 × 50 which equals 325900
+ 6518 × 400 that equals 2607200
+ 6518 × 6000 yielding 39108000

= 42073690
