Alright, let's work through 65842828 times 81335306 step by step
65842828 × 81335306 = 81335306 × (65842828)
+ 81335306 × 8 what gives us 650682448
+ 81335306 × 20 yielding 1626706120
+ 81335306 × 800 producing 65068244800
+ 81335306 × 2000 yielding 162670612000
+ 81335306 × 40000 that is equal 3253412240000
+ 81335306 × 800000 which equals 65068244800000
+ 81335306 × 5000000 giving us 406676530000000
+ 81335306 × 60000000 that is equal 4880118360000000

= 5355346563285368
