Translate the following English sentence to French:
"Is it not obvious that we must step up the controls, section more policemen and carry out 20 times the amount of controls in order to be able to guarantee that controls are being carried out properly?"
Nous devons, semble-t-il, renforcer les contrôles, renforcer la présence de la police, multiplier par vingt afin d' avoir des garanties de contrôle ?