No problem, we've got 1333 and 1389 to multiply
1333 × 1389 = 1389 × (1333)
+ 1389 × 3 that equals 4167
+ 1389 × 30 giving us 41670
+ 1389 × 300 what gives us 416700
+ 1389 × 1000 that is equal 1389000

= 1851537
