Bilal says, ‘Fiqh means understanding, so understanding a mathematics problem is also Fiqh in its technical sense.’ What is the correct explanation?

What Is Fiqh?

• Understanding is the linguistic meaning; technically, Fiqh is the discipline of understanding Shari'ah rulings related to human actions.
• Every kind of understanding is technically Fiqh.
• Fiqh has no linguistic meaning.