There are 7 pairs of white gloves, 8 pairs of black gloves, and 9 pairs of red gloves in a bag. A child takes out gloves from a bag in the dark, one at a time, but cannot see the color clearly. In order to ensure that he can touch at least 6 pairs of gloves, he must take out at least how many gloves (gloves are not divided into left and right hands). , Any two can only form a pair).
有7双白手套，8双黑手套，9双红手套放在一只袋子里．一位小朋友在黑暗中从袋中摸取手套，每次摸一只，但无法看清颜色，为了确保能摸到至少6双手套，他最少要摸出手套多少只(手套不分左、右手，任意二只可成一双)．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 3 + 1</gadget>
<output>14</output>

<result>14</result>