We're going to solve 64985999 multiplied by 65200343
64985999 × 65200343 = 65200343 × (64985999)
+ 65200343 × 9 producing 586803087
+ 65200343 × 90 that is equal 5868030870
+ 65200343 × 900 resulting in 58680308700
+ 65200343 × 5000 what gives us 326001715000
+ 65200343 × 80000 yielding 5216027440000
+ 65200343 × 900000 what gives us 58680308700000
+ 65200343 × 4000000 that results in 260801372000000
+ 65200343 × 60000000 which equals 3912020580000000

= 4237109424997657
