Xiaoli has 18 pictures, and after giving 3 pieces to Xiaolong, both of them have the same number of pictures. How many pictures did Xiaolong have?
小力有18张画片，送给小龙3张后，两人的画片同样多．小龙原来有几张画片？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">18 - 6</gadget>
<output>12</output>

<result>12</result>