Given the task definition and input, reply with output. You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

thanksgiving is coming and dr. mary wants to celebrate it by sharing her blessing to different charities . she first went to oldtown where she donated $ 700 in total to 3 different nursing homes . if she gave $ 245 to the first home and $ 225 to the second how much did she give to the third home ?
230