No problem, we've got 6445 and 6278 to multiply
6445 × 6278 = 6278 × (6445)
+ 6278 × 5 that equals 31390
+ 6278 × 40 which equals 251120
+ 6278 × 400 that equals 2511200
+ 6278 × 6000 that is equal 37668000

= 40461710
