Simulink: Integration with respect to distance

[exidez]

This may be really simple but i just cant figure out how.

The 1/s integration block integrates a signal with respect to time. However, i dont want time.
I need to calculate work done. So i have a non constant force (F) and i want to integrate it by the distance travelled.

i have both signals force and distance i just dont now how to integrate force with respect to distance in simulnk

How can this be done??

Thanks