Unfortunately, you are using an automatic translator instead of a dictionary. Spoiler alert: There is not a single good automatic translator for Latin.
For this kind of task, you should use a dictionary: take a look at Which online Latin dictionaries should I use and why? for information about which to pick.
"Multaque" is a combination of multa and the enclitic -que.
- Multa is either the feminine singular nominative (or ablative, if multā) or neuter plural nominative/accusative of the adjective multus, -a, -um, which means "much/many." It can also be the noun multa, as pointed out in Joonas's answer.
- -que simply means "and"
Multaque doesn't mean anything in particular outside of its context. It is as meaningful/meaningless as English, "And much." Here is an example of it used in context, along with its translation:
Multaque in ea genera ferarum nasci constat, quae reliquis in locis visa non sint... (Caesar, De Bello Gallico 6.25.5)
Translation:
And it is well known that many kinds of beasts are born in it [Germany], which have not been seen in other places.