The tortoise and the hare race, the whole journey is 5.2km, the speed of the rabbit is 20km/h, the speed of the tortoise is 2km/h, the tortoise keeps running, but the rabbit is playing while running, it first runs for 1 minute, then plays for 15 minutes, and runs again 2 minutes, then play for another 15 minutes, run for another 3 minutes, play for another 15 minutes... so who gets to the end first? How many minutes is the first comer faster than the latter?
龟兔赛跑，全程5.2km，兔子的速度是20km/h，乌龟的速度是2km/h，乌龟不停地跑，但兔子边跑边玩，它先跑1分钟，然后玩15分钟，又跑2分钟，然后又玩15分钟，再跑3分钟，又玩15分钟…那么谁先到达终点？先到者比后者快多少分钟？
<gadget id="calculator">5.2 / 2</gadget>
<output>2.6</output>

<gadget id="calculator">2.6 * 60</gadget>
<output>156</output>

<gadget id="calculator">1 + 20</gadget>
<output>21</output>

<gadget id="calculator">2 + 20</gadget>
<output>22</output>

<gadget id="calculator">3 + 20</gadget>
<output>23</output>

<gadget id="calculator">4 + 20</gadget>
<output>24</output>

<gadget id="calculator">5 + 20</gadget>
<output>25</output>

<gadget id="calculator">21 + 22 + 23 + 24 + 25</gadget>
<output>115</output>

<gadget id="calculator">5.2 / 20</gadget>
<output>0.26</output>

<gadget id="calculator">0.26 * 60</gadget>
<output>15.6</output>

<gadget id="calculator">15.6 - 15</gadget>
<output>0.6</output>

<gadget id="calculator">115 + 0.6</gadget>
<output>115.6</output>

<gadget id="calculator">156 - 115.6</gadget>
<output>40.4</output>

<result>40.4</result>