No problem, we've got 8406 and 8403 to multiply
8406 × 8403 = 8403 × (8406)
+ 8403 × 6 that equals 50418
+ 8403 × 00 that equals 0
+ 8403 × 400 that results in 3361200
+ 8403 × 8000 that results in 67224000

= 70635618
