Xiao Ming was not serious when doing his homework. He regarded the 6 in the subtrahend as 0, and the 1 in the subtrahend as 7. The result became 137. Do you know the correct answer?
小明做作业时不认真，把减数个位上的6看成了0，把减数十位上的1看成了7，结果得数变成了137，你知道正确的答案是多少吗？
<gadget id="calculator">137 + 70</gadget>
<output>207</output>

<gadget id="calculator">207 - 16</gadget>
<output>191</output>

<result>191</result>