Bin Bin did a subtraction problem, taking the 6 in the subtrahend's place as 9, and the 1 in the subtrahend's place as 5, the result is 217, what should be the correct result?
宾宾做一道减法题，把被减数十位上的6当作9，把减数个位上的1当成5，结果是217，正确计算结果应该是多少．
<gadget id="calculator">90 - 60</gadget>
<output>30</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<gadget id="calculator">217 - 26</gadget>
<output>191</output>

<result>191</result>