No problem, we've got 5131 and 1250 to multiply
5131 × 1250 = 1250 × (5131)
+ 1250 × 1 that equals 1250
+ 1250 × 30 giving us 37500
+ 1250 × 100 giving us 125000
+ 1250 × 5000 that equals 6250000

= 6413750
