Alright, let's work through 87603206 times 66669932 step by step
87603206 × 66669932 = 66669932 × (87603206)
+ 66669932 × 6 resulting in 400019592
+ 66669932 × 00 that equals 0
+ 66669932 × 200 resulting in 13333986400
+ 66669932 × 3000 that results in 200009796000
+ 66669932 × 00000 yielding 0
+ 66669932 × 600000 what gives us 40001959200000
+ 66669932 × 7000000 yielding 466689524000000
+ 66669932 × 80000000 what gives us 5333594560000000

= 5840499787001992
