Alright, let's work through 99850900 times 21836807 step by step
99850900 × 21836807 = 21836807 × (99850900)
+ 21836807 × 0 yielding 0
+ 21836807 × 00 resulting in 0
+ 21836807 × 900 yielding 19653126300
+ 21836807 × 0000 that equals 0
+ 21836807 × 50000 that equals 1091840350000
+ 21836807 × 800000 which equals 17469445600000
+ 21836807 × 9000000 that results in 196531263000000
+ 21836807 × 90000000 that results in 1965312630000000

= 2180424832076300
