No problem, we've got 1971 and 2159 to multiply
1971 × 2159 = 2159 × (1971)
+ 2159 × 1 which equals 2159
+ 2159 × 70 that results in 151130
+ 2159 × 900 that equals 1943100
+ 2159 × 1000 that is equal 2159000

= 4255389
