No problem, we've got 1639 and 1098 to multiply
1639 × 1098 = 1098 × (1639)
+ 1098 × 9 that equals 9882
+ 1098 × 30 which equals 32940
+ 1098 × 600 that is equal 658800
+ 1098 × 1000 which equals 1098000

= 1799622
