No problem, we've got 1658 and 1390 to multiply
1658 × 1390 = 1390 × (1658)
+ 1390 × 8 what gives us 11120
+ 1390 × 50 producing 69500
+ 1390 × 600 which equals 834000
+ 1390 × 1000 resulting in 1390000

= 2304620
