No problem, we've got 6405 and 1297 to multiply
6405 × 1297 = 1297 × (6405)
+ 1297 × 5 that results in 6485
+ 1297 × 00 which equals 0
+ 1297 × 400 what gives us 518800
+ 1297 × 6000 which equals 7782000

= 8307285
