YOU SAID:
It took me ninety days to complete my many tasks that were assigned to me.
INTO JAPANESE
私に割り当てられた多くの仕事を完了するのに 90 日かかりました。
BACK INTO ENGLISH
It took me 90 days to complete many of the tasks assigned to me.
INTO JAPANESE
私に割り当てられたタスクの多くを完了するのに 90 日かかりました。
BACK INTO ENGLISH
It took me 90 days to complete many of the tasks assigned to me.
That didn't even make that much sense in English.