Alright, let's work through 87743755 times 75667720 step by step
87743755 × 75667720 = 75667720 × (87743755)
+ 75667720 × 5 which equals 378338600
+ 75667720 × 50 that equals 3783386000
+ 75667720 × 700 yielding 52967404000
+ 75667720 × 3000 giving us 227003160000
+ 75667720 × 40000 giving us 3026708800000
+ 75667720 × 700000 what gives us 52967404000000
+ 75667720 × 7000000 what gives us 529674040000000
+ 75667720 × 80000000 what gives us 6053417600000000

= 6639369885088600
