Alright, let's work through 87623789 times 69173209 step by step
87623789 × 69173209 = 69173209 × (87623789)
+ 69173209 × 9 giving us 622558881
+ 69173209 × 80 that is equal 5533856720
+ 69173209 × 700 that equals 48421246300
+ 69173209 × 3000 that equals 207519627000
+ 69173209 × 20000 yielding 1383464180000
+ 69173209 × 600000 yielding 41503925400000
+ 69173209 × 7000000 that results in 484212463000000
+ 69173209 × 80000000 producing 5533856720000000

= 6061218669868901
