No problem, we've got 5642 and 3915 to multiply
5642 × 3915 = 3915 × (5642)
+ 3915 × 2 giving us 7830
+ 3915 × 40 yielding 156600
+ 3915 × 600 which equals 2349000
+ 3915 × 5000 what gives us 19575000

= 22088430
