No problem, we've got 8420 and 4150 to multiply
8420 × 4150 = 4150 × (8420)
+ 4150 × 0 that equals 0
+ 4150 × 20 which equals 83000
+ 4150 × 400 that is equal 1660000
+ 4150 × 8000 giving us 33200000

= 34943000
