You can upload them to a photo hosting site such as photobucket and then they automatically can resize them to a size that would work here. You just choose the option of "Direct link" and copy and paste that address where it says "Upload File from a URL" on the manage attachments menu. You can only paste one picture at a time, but you can do it 4 times on each post. Photobucket has a application that makes it easy to take a picture and upload it.
https://itunes.apple.com/us/app/phot...314439840?mt=8