The minuend remains unchanged, and the subtrahend is added with 10, what is the difference?
被减数不变，减数加上10，差多少．
<gadget id="calculator">200 - 100</gadget>
<output>100</output>

<gadget id="calculator">200 - 110</gadget>
<output>90</output>

<gadget id="calculator">100 - 90</gadget>
<output>10</output>

<result>10</result>