No problem, we've got 1562 and 4389 to multiply
1562 × 4389 = 4389 × (1562)
+ 4389 × 2 giving us 8778
+ 4389 × 60 that equals 263340
+ 4389 × 500 what gives us 2194500
+ 4389 × 1000 resulting in 4389000

= 6855618
