Background Calculation on device - is it possible without triggering Watchdog?

I have a bit of calculation to do in my app - basically it is couple embedded loop with simple operations in them - around 30K addition operations in total. Normally it runs in less than a second, but it manages to trigger Watchdog after about 3K iterations:

Error: Watchdog Tripped Error - Code Executed Too Long

Is it possible to have longer execution time in some sort of background thread?