Add 10 to a number, multiply by 10, subtract 10, divide by 10 to get 10, what is the number?
一个数加上10，乘以10，减去10，除以10等于10，则这个数是多少．
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">100 + 10</gadget>
<output>110</output>

<gadget id="calculator">110 / 10</gadget>
<output>11</output>

<gadget id="calculator">11 - 10</gadget>
<output>1</output>

<result>1</result>