YOU SAID:

if i buy 3 kats they will multiply if there are females

INTO JAPANESE

私が3匹の猫を買うなら、女性がいるなら彼らは増えるでしょう

BACK INTO ENGLISH

If I buy 3 cats, they will increase if there are women

INTO JAPANESE

猫を3匹買うと女性がいると増えます

BACK INTO ENGLISH

If you buy 3 cats, it will increase if you have women.

INTO JAPANESE

猫を3匹買うと、女性がいると増えます。

BACK INTO ENGLISH

If you buy 3 cats, it will increase if you have women.