No problem, we've got 1639 and 2235 to multiply
1639 × 2235 = 2235 × (1639)
+ 2235 × 9 that equals 20115
+ 2235 × 30 that results in 67050
+ 2235 × 600 giving us 1341000
+ 2235 × 1000 which equals 2235000

= 3663165
