Pls help my homework

Fred wants to make brownies to make brownies he needs 2 ÷ 3cups of flour per batch of brownies if fred has 17 cups of flour then how many can fred make

Iam a german native. my grandpa and grandma and i are going to germany to visit family and friends. my grandpa set some rules though that i have to get done before i can go. i have to be done with my 11th grade work and i have to be fluent in german i know some of the basics but i am not fluent. i am just worried i am not going to get it all done in time. any advice?

How to say 'hello, good morning in german?