Xiao Ming and his 8 good friends each have two pictures, how many pictures do they have in total?
小明和他的8个好朋友每人都有两张画片，他们一共有多少张画片．
<gadget id="calculator">1 + 8</gadget>
<output>9</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<result>18</result>