No problem, we've got 9920 and 8356 to multiply
9920 × 8356 = 8356 × (9920)
+ 8356 × 0 that equals 0
+ 8356 × 20 what gives us 167120
+ 8356 × 900 giving us 7520400
+ 8356 × 9000 that equals 75204000

= 82891520
