Alright, let's work through 987988 times 18216806 step by step
987988 × 18216806 = 18216806 × (987988)
+ 18216806 × 8 resulting in 145734448
+ 18216806 × 80 what gives us 1457344480
+ 18216806 × 900 what gives us 16395125400
+ 18216806 × 7000 what gives us 127517642000
+ 18216806 × 80000 yielding 1457344480000
+ 18216806 × 900000 resulting in 16395125400000

= 17997985726328
