A and B start from two places 35.8 kilometers apart at the same time and walk toward each other. A travels 4 kilometers per hour, but rests for 5 minutes every 30 minutes. B travels 12 kilometers per hour. Then after how many hours the two meet.
甲、乙两人同时分别从相距35.8千米的两地出发，相向而行，甲每小时行4千米，但每行30分钟就休息5分钟，乙每小时行12千米．则经过多少小时两人相遇．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 * (1/2) * 3</gadget>
<output>6</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

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

<gadget id="calculator">90 + 15</gadget>
<output>105</output>

<gadget id="calculator">105 / 60</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">12 * (7/4)</gadget>
<output>21</output>

<gadget id="calculator">6 + 21</gadget>
<output>27</output>

<gadget id="calculator">35.8 - 27</gadget>
<output>8.8</output>

<gadget id="calculator">4 + 12</gadget>
<output>16</output>

<gadget id="calculator">8.8 / 16</gadget>
<output>0.55</output>

<gadget id="calculator">0.55 + (7/4)</gadget>
<output>2.3</output>

<result>2.3</result>