A snail climbs up from the bottom of a wooden barrel with a height of 9 decimeters. It takes 3 minutes for every 3 decimeters to climb, and then rests for 2 minutes. How long does it take for the snail to climb from the bottom of the barrel to the edge of the barrel?
一只蜗牛从9分米高的木桶底往上爬，它每爬3分米要3分钟，然后休息2分钟，蜗牛从桶底爬到桶沿要用多长时间？
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 - 2</gadget>
<output>13</output>

<result>13</result>