Alright, let's work through 53523820 times 80483018 step by step
53523820 × 80483018 = 80483018 × (53523820)
+ 80483018 × 0 that results in 0
+ 80483018 × 20 yielding 1609660360
+ 80483018 × 800 yielding 64386414400
+ 80483018 × 3000 giving us 241449054000
+ 80483018 × 20000 that is equal 1609660360000
+ 80483018 × 500000 which equals 40241509000000
+ 80483018 × 3000000 giving us 241449054000000
+ 80483018 × 50000000 yielding 4024150900000000

= 4307758568488760
