Dux romanus, qui ad graeciam belli gerendi gratia venerat, multa pulchra ad romam ferebat. i'm really having trouble with how to translate the belli gerendi gratia part. i know that it's a gerundive but how do i put belli with it?

Bailey enjoys working with her hands. she wants to choose a career path that would allow her to create things. which career would be best for her? a. zoologist b. greenhouse nursery worker c. energy auditor d. civil engineer e. jeweler and metal worker