How do I math code Product symbol other than type $\prod_{i=1}^{n}$ [duplicate]

Question

I can code symbols of the type $$\prod_{i=1}^{n}$$ but when it comes to:

I cannot get the less-than-equal sign placed as shown.Can this be done easily?

EDIT: below removed as reason explained in the comments **not sure why $\prod_{i=1}^{n}$ not displaying properly while in math.stackexchange its fine*

Answer 1

If it's for in-line mathematics, you can use

$\prod\limits_{i\le 7}$,

but be aware this may slightly increase the vertical spacing with the line below.

Answer 2

Have you even tried it?

\documentclass{article}
\begin{document}
\[ \prod_{p \leq 7} \biggl( 1 - \frac{1}{p} \biggr) \]
\end{document}