A and B travel back and forth from places A and B that are 40 kilometers apart. A travels 4 kilometers per hour. After A starts 3 hours later, B starts from B and travels 5 kilometers per hour. After the two met, they continued to walk. How many kilometers away from the place where they met for the second time?
甲乙两人从相距40千米的A，B两地相向往返而行，甲每小时行4千米，甲出发3小时后，乙从B地出发，每小时行5千米．两人相遇后继续行走，他们第二次相遇地点距A地多少千米？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">40 - 12</gadget>
<output>28</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">28 / 9</gadget>
<output>28/9 = around 3.111111</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">40 * (2/9)</gadget>
<output>80/9 = around 8.888889</output>

<gadget id="calculator">(28/9) + (80/9)</gadget>
<output>12</output>

<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<result>20</result>