How many cards are drawn from a deck of playing cards (54 cards) to ensure that there must be a spade?
从一幅扑克牌(54张)中抽出几张来，才能保证一定有一张黑桃？
<gadget id="calculator">13 * 3</gadget>
<output>39</output>

<gadget id="calculator">39 + 2 + 1</gadget>
<output>42</output>

<result>42</result>