Alright, let's work through 78585402 times 59687607 step by step
78585402 × 59687607 = 59687607 × (78585402)
+ 59687607 × 2 that equals 119375214
+ 59687607 × 00 that equals 0
+ 59687607 × 400 that is equal 23875042800
+ 59687607 × 5000 which equals 298438035000
+ 59687607 × 80000 what gives us 4775008560000
+ 59687607 × 500000 yielding 29843803500000
+ 59687607 × 8000000 which equals 477500856000000
+ 59687607 × 70000000 which equals 4178132490000000

= 4690574590513014
