YOU SAID:
My brother went to the store to buy three apples
INTO JAPANESE
私の兄はリンゴを3つ買いに店に行った
BACK INTO ENGLISH
My brother went to the store to buy three apples.
INTO JAPANESE
弟はリンゴを3個買いに店に行った。
BACK INTO ENGLISH
My brother went to the store to buy three apples.
Well done, yes, well done!