Alright, let's work through 13087074 times 39853329 step by step
13087074 × 39853329 = 39853329 × (13087074)
+ 39853329 × 4 producing 159413316
+ 39853329 × 70 resulting in 2789733030
+ 39853329 × 000 that is equal 0
+ 39853329 × 7000 yielding 278973303000
+ 39853329 × 80000 which equals 3188266320000
+ 39853329 × 000000 what gives us 0
+ 39853329 × 3000000 resulting in 119559987000000
+ 39853329 × 10000000 yielding 398533290000000

= 521563465769346
