Alright, let's work through 48815475 times 15893418 step by step
48815475 × 15893418 = 15893418 × (48815475)
+ 15893418 × 5 giving us 79467090
+ 15893418 × 70 giving us 1112539260
+ 15893418 × 400 which equals 6357367200
+ 15893418 × 5000 giving us 79467090000
+ 15893418 × 10000 which equals 158934180000
+ 15893418 × 800000 yielding 12714734400000
+ 15893418 × 8000000 yielding 127147344000000
+ 15893418 × 40000000 what gives us 635736720000000

= 775844749043550
