Alright, let's work through 87669540 times 13606729 step by step
87669540 × 13606729 = 13606729 × (87669540)
+ 13606729 × 0 what gives us 0
+ 13606729 × 40 giving us 544269160
+ 13606729 × 500 that results in 6803364500
+ 13606729 × 9000 what gives us 122460561000
+ 13606729 × 60000 that results in 816403740000
+ 13606729 × 600000 which equals 8164037400000
+ 13606729 × 7000000 that results in 95247103000000
+ 13606729 × 80000000 that is equal 1088538320000000

= 1192895672334660
