No problem, we've got 8406 and 8663 to multiply
8406 × 8663 = 8663 × (8406)
+ 8663 × 6 yielding 51978
+ 8663 × 00 what gives us 0
+ 8663 × 400 that equals 3465200
+ 8663 × 8000 yielding 69304000

= 72821178
