C++ 11 and the new features, how can i write this code with the new range-based for loops technique?

If i am about to loop through a map or a multimap normaly i use iterators, they are very easy and very handy! Altought everything works i do know there is a way to loop through things with the new c++11 format such as

for(auto a : multimap_name){}

My question is, what if the iterator is using a function? How can i make it work... herer is an example how i would do it with iterator:

for(multimap<intm, string>::iterator it = multimap_name.find(7); it != multimap_name.end(); it++){}

that code would run through the map find the number 7 key and from there it would loop untill the end of the map, how can i do the same with c++ Range-based for loops?

Ive tried a little bit and i dont get it to work, myh best guess was:

for(auto a.find(7) : multimap_name){}

I am new to programming and i am trying my best to not ask questions, but it just seems impossible not to sometimes. Thank you for your help!