Add 25 to Xiaodong's age this year, multiply by 8, then subtract 100, the difference is 180, then how old is Xiaodong this year?
小冬今年的年龄加上25所得的和乘以8，再减去100，差是180，则小冬今年多少岁．
<gadget id="calculator">25 * 8</gadget>
<output>200</output>

<gadget id="calculator">180 - 200</gadget>
<output>-20</output>

<gadget id="calculator">100 + (-20)</gadget>
<output>80</output>

<gadget id="calculator">80 / 8</gadget>
<output>10</output>

<result>10</result>