A and B each have some pictures in their hands. If A gives B 12 pictures, the number of pictures in their hands is equal. If B gives A 12 pictures, the number of pictures in A is 4 times that of B. Then A How many original pictures.
甲、乙两人手里各有一些画片，如果甲给乙12张画片，则他俩手里的画片数相等，如果乙给甲12张画片，则甲的画片数是乙的4倍，则甲原有画片多少张．
<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">48 + 24 + 12</gadget>
<output>84</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">84 / 3</gadget>
<output>28</output>

<gadget id="calculator">28 + 24</gadget>
<output>52</output>

<result>52</result>