No problem, we've got 2120 and 8180 to multiply
2120 × 8180 = 8180 × (2120)
+ 8180 × 0 giving us 0
+ 8180 × 20 giving us 163600
+ 8180 × 100 which equals 818000
+ 8180 × 2000 that is equal 16360000

= 17341600
