No problem, we've got 8131 and 6378 to multiply
8131 × 6378 = 6378 × (8131)
+ 6378 × 1 that equals 6378
+ 6378 × 30 producing 191340
+ 6378 × 100 producing 637800
+ 6378 × 8000 producing 51024000

= 51859518
