Amount with

Grammar: Unsorted

分(ぶん) after a number, counter, or noun marks an amount or share: “enough for”, “worth of”, or “portion”.

Examples

Amount eaten with 〜分

Manga panel from 三ツ星カラーズ showing example of Amount eaten with 〜分.
三ツ星カラーズ » Volume 1 » Page 23

Sacchan and her friends are tasked with going around and selling excess bananas from her mother’s fruit shop. They offer a banana to a shop owner, and when he eats it, Sacchan says he needs to pay for it. The owner realizes he fell for their trap, but offers to buy a bunch.

琴葉(ことは):
「私(わたし)たちが食(た)べてる分(ぶん)も買(か)うといい」
“You should also buy the amount we're eating.”
おやじ:
「まったく。かなわねぇなぁ。わっはっは」
“Good grief, I'm outclassed. Wahahah!”