YOU SAID:

I walked fifteen miles uphill both ways to get to school

INTO JAPANESE

私は学校に行くために上り坂を往復15マイル歩いた

BACK INTO ENGLISH

I walked 15 miles round trip uphill to get to school

INTO JAPANESE

私は学校に行くために上り坂を往復15マイル歩きました

BACK INTO ENGLISH

I walked 15 miles round trip uphill to get to school.

INTO JAPANESE

私は学校に行くために上り坂を往復 15 マイル歩きました。

BACK INTO ENGLISH

I walked 15 miles round trip uphill to get to school.