Alright, let's work through 88378191 times 13025309 step by step
88378191 × 13025309 = 13025309 × (88378191)
+ 13025309 × 1 what gives us 13025309
+ 13025309 × 90 giving us 1172277810
+ 13025309 × 100 that equals 1302530900
+ 13025309 × 8000 yielding 104202472000
+ 13025309 × 70000 producing 911771630000
+ 13025309 × 300000 that equals 3907592700000
+ 13025309 × 8000000 what gives us 104202472000000
+ 13025309 × 80000000 that is equal 1042024720000000

= 1151153246636019
