When the little sloppy was doing a subtraction problem, he mistakenly wrote the subtrahend 210 as 120, and the difference he got was exactly 1000. What is the correct difference.
小马虎在做一道减法题时，把减数210错写成120，这时得到的差刚好是1000．正确的差是多少．
<gadget id="calculator">210 - 120</gadget>
<output>90</output>

<gadget id="calculator">1_000 - 90</gadget>
<output>910</output>

<result>910</result>