Alright, let's work through 12507072 times 42276180 step by step
12507072 × 42276180 = 42276180 × (12507072)
+ 42276180 × 2 what gives us 84552360
+ 42276180 × 70 what gives us 2959332600
+ 42276180 × 000 what gives us 0
+ 42276180 × 7000 what gives us 295933260000
+ 42276180 × 00000 that is equal 0
+ 42276180 × 500000 what gives us 21138090000000
+ 42276180 × 2000000 that equals 84552360000000
+ 42276180 × 10000000 giving us 422761800000000

= 528751227144960
