Alright, let's work through 42875435 times 91691891 step by step
42875435 × 91691891 = 91691891 × (42875435)
+ 91691891 × 5 which equals 458459455
+ 91691891 × 30 what gives us 2750756730
+ 91691891 × 400 that is equal 36676756400
+ 91691891 × 5000 which equals 458459455000
+ 91691891 × 70000 giving us 6418432370000
+ 91691891 × 800000 what gives us 73353512800000
+ 91691891 × 2000000 giving us 183383782000000
+ 91691891 × 40000000 giving us 3667675640000000

= 3931329712597585
