Alright, let's work through 48630303 times 21578943 step by step
48630303 × 21578943 = 21578943 × (48630303)
+ 21578943 × 3 giving us 64736829
+ 21578943 × 00 what gives us 0
+ 21578943 × 300 producing 6473682900
+ 21578943 × 0000 which equals 0
+ 21578943 × 30000 that results in 647368290000
+ 21578943 × 600000 that results in 12947365800000
+ 21578943 × 8000000 giving us 172631544000000
+ 21578943 × 40000000 resulting in 863157720000000

= 1049390536509729
