Alright, let's work through 39697839 times 39360613 step by step
39697839 × 39360613 = 39360613 × (39697839)
+ 39360613 × 9 what gives us 354245517
+ 39360613 × 30 resulting in 1180818390
+ 39360613 × 800 that is equal 31488490400
+ 39360613 × 7000 producing 275524291000
+ 39360613 × 90000 resulting in 3542455170000
+ 39360613 × 600000 that is equal 23616367800000
+ 39360613 × 9000000 yielding 354245517000000
+ 39360613 × 30000000 giving us 1180818390000000

= 1562531277815307
