How is the work output of a machine calculated a. by measuring the imput force b. by calculating the output distance c. by measuring the output force ny the output distance d. by dividing the input force by the output force

it is by multiplying the output force by the output distance

The work output  of a machine is measured  or calculated by measuring the output force  and the output distance.  Work output is the work done by a simple machine or any type of an engine model, it is the energy output, which for machines is always less than the energy input, due to factors such as friction of the moving parts.

I don't know sorry' please