Mother Panda’s baby—the little panda is 2 years old this year. After several years, when the little panda is the same age as the mother panda, the mother panda will be 18 years old. How old is the panda mother this year?
熊猫妈妈的小宝宝--小熊猫今年2岁了，过若干年以后，当小熊猫和熊猫妈妈当年年龄一样大时，熊猫妈妈已经18岁了．熊猫妈妈今年是多少岁．
<gadget id="calculator">18 + 2</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>