YOU SAID:

If I get 100 likes I will buy a cat

INTO JAPANESE

私は100いいねを得る場合、私は猫を買うだろう

BACK INTO ENGLISH

If I get 100 likes, I'll buy a cat

INTO JAPANESE

私は100いいねを得る場合は、私は猫を買うだろう

BACK INTO ENGLISH

If I get 100 likes, I'll buy a cat