No problem, we've got 8520 and 3705 to multiply
8520 × 3705 = 3705 × (8520)
+ 3705 × 0 which equals 0
+ 3705 × 20 what gives us 74100
+ 3705 × 500 that equals 1852500
+ 3705 × 8000 which equals 29640000

= 31566600
