No problem, we've got 5314 and 1578 to multiply
5314 × 1578 = 1578 × (5314)
+ 1578 × 4 what gives us 6312
+ 1578 × 10 that equals 15780
+ 1578 × 300 yielding 473400
+ 1578 × 5000 that equals 7890000

= 8385492
