Alright, let's work through 6445 times 7312 step by step
6445 × 7312 = 7312 × (6445)
+ 7312 × 5 producing 36560
+ 7312 × 40 giving us 292480
+ 7312 × 400 that is equal 2924800
+ 7312 × 6000 that results in 43872000

= 47125840
