No problem, we've got 8384 and 8409 to multiply
8384 × 8409 = 8409 × (8384)
+ 8409 × 4 yielding 33636
+ 8409 × 80 yielding 672720
+ 8409 × 300 what gives us 2522700
+ 8409 × 8000 which equals 67272000

= 70501056
