Alright, let's work through 87407140 times 99298398 step by step
87407140 × 99298398 = 99298398 × (87407140)
+ 99298398 × 0 that is equal 0
+ 99298398 × 40 that is equal 3971935920
+ 99298398 × 100 resulting in 9929839800
+ 99298398 × 7000 giving us 695088786000
+ 99298398 × 00000 resulting in 0
+ 99298398 × 400000 what gives us 39719359200000
+ 99298398 × 7000000 producing 695088786000000
+ 99298398 × 80000000 that equals 7943871840000000

= 8679388975761720
