Which word is indicative that it is "several" or "some" oranges?

Should several not rather be "mehrere"?

In other words I would have said " Ja, aus mehrere Orangen machen wir Saft."

I do not understand how 'einigen' can be interpreted as 'several' from the explanations given in the drop down menu. A German /English dictionary does give the definition' to agree on' for einigen so the menu is correct. However a translation of the word 'einiger' includes the word several, it is the only word that includes this translation.