I'm using multiselection in one of my parameters and I would like to know how to query those parameters like for example if

I want to query parameters that has 1 (doesn't matter if there are other values)

Value one has : 1, 2, 3 Value two has: 5, 1, 6 Value three has: 5, 6, 9

It should only bring Value one and two

I know you can do something like (for non array values):

const librosRef = db.collection('libros');
const queryRef = librosRef.where('grado', '==', '4° Grado');

and it would bring all the documents in that collection that has 4° Grado but if I try to do that while using a multiselection it doesn't bring anything.

This is what I'm trying (doesn't work for array which is what I'm trying to figure out):

const productosRef = db.collection('productosAIB');
    const queryRef = productosRef.where('grado', '==', '4° Grado');

    useEffect(() => {
        queryRef.orderBy("precio")
        .get()
        .then((snapshot) => {
              const tempData = [];
            snapshot.forEach((doc) => {

              const data = doc.data();
              tempData.push(data);
            });
            setProductos(tempData);
          });
      }, []);

Example of how it gets stored in the Firebase:

And this is how it looks in the table (without the query because if I add the query it doesn't show anything )