Alright, let's work through 6471 times 2531 step by step
6471 × 2531 = 2531 × (6471)
+ 2531 × 1 what gives us 2531
+ 2531 × 70 that equals 177170
+ 2531 × 400 which equals 1012400
+ 2531 × 6000 resulting in 15186000

= 16378101
