There are 4 poker cards of four suits each. If you want to draw out poker cards, there must be 3 cards of the same color. At least how many cards must be drawn out.
有四种花色的扑克牌各4张，要想摸出的扑克牌中一定有3张是同色的，至少要摸出多少张．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>