Alright, let's work through 1242972 times 51203864 step by step
1242972 × 51203864 = 51203864 × (1242972)
+ 51203864 × 2 producing 102407728
+ 51203864 × 70 giving us 3584270480
+ 51203864 × 900 that equals 46083477600
+ 51203864 × 2000 which equals 102407728000
+ 51203864 × 40000 giving us 2048154560000
+ 51203864 × 200000 yielding 10240772800000
+ 51203864 × 1000000 giving us 51203864000000

= 63644969243808
