No problem, we've got 9841 and 850 to multiply
9841 × 850 = 850 × (9841)
+ 850 × 1 that is equal 850
+ 850 × 40 that is equal 34000
+ 850 × 800 giving us 680000
+ 850 × 9000 which equals 7650000

= 8364850
