Alright, let's work through 42689578 times 39711928 step by step
42689578 × 39711928 = 39711928 × (42689578)
+ 39711928 × 8 giving us 317695424
+ 39711928 × 70 that is equal 2779834960
+ 39711928 × 500 that equals 19855964000
+ 39711928 × 9000 that equals 357407352000
+ 39711928 × 80000 that equals 3176954240000
+ 39711928 × 600000 giving us 23827156800000
+ 39711928 × 2000000 producing 79423856000000
+ 39711928 × 40000000 giving us 1588477120000000

= 1695285447886384
