Xiao Gang collected some cards, he took out half of the cards and gave 6 more cards to Xiao Li, and he had 20 cards left. How many cards did Xiao Gang have?
小刚收集了一些卡片，他拿出卡片的一半还多6张送给小力，自己还剩20张．小刚原来有多少张卡片？
<gadget id="calculator">20 + 6</gadget>
<output>26</output>

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<result>52</result>