No problem, we've got 1510 and 6389 to multiply
1510 × 6389 = 6389 × (1510)
+ 6389 × 0 that is equal 0
+ 6389 × 10 that is equal 63890
+ 6389 × 500 what gives us 3194500
+ 6389 × 1000 which equals 6389000

= 9647390
