YOU SAID:
The car went at 6 cats per decade.
INTO JAPANESE
車は10年に6匹の猫で行きました。
BACK INTO ENGLISH
The car went with six cats in ten years.
INTO JAPANESE
その車は10年間で6匹の猫と一緒に行きました。
BACK INTO ENGLISH
The car went with six cats in ten years.
You love that! Don't you?