all you have to do is
Just pray.
Il suffit de ne pas baisser les yeux.
You just have to not look down.
Si vous voulez savoir, il suffit de demander.
If you want to know, just ask.
Il suffit de passer quelques coups de fil.
Just make a few phone calls.
Il suffit de trouver ce scientifique.
All we have to do is find this scientist.
— Les Aventures de Bill et Ted (1991)
C'est facile, il suffit de se jeter à l'eau.
It's easy; you just have to take the plunge.
— Good Bye Lenin! (2003)
Il suffit de glisser sur les genoux.
You just have to slide on your knees.
— Tenacious D Et Le Mediator Du Destin (2006)