There is a snail climbing up from a 25 cm deep jar, and it takes 3 minutes for every 5 cm to climb, and then rests for 1 minute. Then how many minutes does it take at least to climb out of the mouth of the tank?
有一只蜗牛从一个深25厘米的罐子里往上爬，每爬5厘米要3分钟，然后休息1分钟．那么它爬出罐口至少需要多少分钟．
<gadget id="calculator">25 / 5</gadget>
<output>5</output>

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

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<gadget id="calculator">15 + 4</gadget>
<output>19</output>

<result>19</result>