From a deck of playing cards (except the king), at least how many cards can be drawn to ensure that 3 cards are of the same suit.
从一副扑克牌(王除外)中，至少摸出多少张才能保证有3张是同一花色的．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

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

<result>9</result>