There are 5 spades and 5 hearts playing cards. If you want to draw 3 cards of the same kind, at least how many cards must be drawn.
黑桃和红桃扑克牌各5张，要想抽出3张同类的牌，至少要抽出多少张．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<result>5</result>