What are all the numbers that when multiplied equal 40?

Answer 1

There are infinitely many possible answers.

40*1

40*1*1

40*1*1*1

and so on.

400*0.1

400*0.1*1

400*0.1*1*1 etc

and then

4000*0.1*0.1

4000*0.1*0.1*1

or

4000*0.01

etc

And then there are irrationals

20*sqrt(2)*sqrt(2)