Alright, let's work through 527997 times 99690159 step by step
527997 × 99690159 = 99690159 × (527997)
+ 99690159 × 7 what gives us 697831113
+ 99690159 × 90 producing 8972114310
+ 99690159 × 900 giving us 89721143100
+ 99690159 × 7000 giving us 697831113000
+ 99690159 × 20000 which equals 1993803180000
+ 99690159 × 500000 that results in 49845079500000

= 52636104881523
