From a complete deck of playing cards. At least how many cards are drawn. In order to ensure that at least 6 cards are of the same suit.
从一副完整的扑克牌中．至少抽出多少张牌．才能保证至少6张牌的花色相同．
<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 2 + 1</gadget>
<output>23</output>

<result>23</result>