We use a simple machine to make a task easier or to enable to do something that we could not do without it. The number of times a machine multiplies the effort force is the mechanical advantage (MA) of the machine. To calculate mechanical advantage, we divide the load by the effort force.

Mechanical advantage (MA) has no units.
This is the actual mechanical advantage of machines. Many machines, such as the bottle opener and the car jack, have a mechanical advantage greater than one. When the MA is greater than one, the machine increases the force applied. Such machines are force multipliers.