The pricing method of the train is: 2 yuan per station within 5 stations (including 5 stations). More than 5 stations and less than 12 stations (including 12 stations) will increase the price by 25% on the basis of 2 yuan per station, and increase the price by 50% on the basis of 2 yuan per station for more than 12 stations. Xiaoming's house is 20 stops away from grandma's house. How much is the ticket?
火车的计价方式为：5站以内(包括5站)每站2元．多于5站少于12站(包括12站)每站在2元的基础上加价25%，12站以上每站在2元的基础上加价50%．小明家离奶奶家共20站，车票钱多少钱？
<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">12 - 5</gadget>
<output>7</output>

<gadget id="calculator">2 * (5/4) * 7</gadget>
<output>35/2 = around 17.5</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">20 - 12</gadget>
<output>8</output>

<gadget id="calculator">2 * (3/2) * 8</gadget>
<output>24</output>

<gadget id="calculator">10 + (35/2) + 24</gadget>
<output>103/2 = around 51.5</output>

<result>103/2 = around 51.5</result>