No problem, we've got 8147 and 8435 to multiply
8147 × 8435 = 8435 × (8147)
+ 8435 × 7 that equals 59045
+ 8435 × 40 producing 337400
+ 8435 × 100 that results in 843500
+ 8435 × 8000 which equals 67480000

= 68719945
