When the little sloppy was doing a subtraction problem, he wrote 5 for the 3 in the tens digit of the subtrahend, and 3 for the 5 in the subtrahend ones digit. The final difference was 825. What should be the correct answer to this question?
小马虎做一道减法题时，把被减数十位上的3错写成5，减数个位上的5错写成3，最后所得的差是825，这题的正确答案应该是多少．
<gadget id="calculator">50 - 30</gadget>
<output>20</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">825 - 20 - 2</gadget>
<output>803</output>

<result>803</result>