The export volume from January to December last year was 2.5 billion US dollars, and the export volume from January to June this year was 1.18 billion US dollars, an increase of 18% over the same period, and an increase of 25% over the same period from July to December. How many billions of dollars are exported this year.
去年1-12月出口额25亿美元，今年1-6月出口额11.8亿美元，比同期增长18%，7-12月比同期增长25%．今年出口额共多少亿美元．
<gadget id="calculator">18 / 100</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">1 + (9/50)</gadget>
<output>59/50 = around 1.18</output>

<gadget id="calculator">11.8 / (59/50)</gadget>
<output>10</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</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">15 * (5/4)</gadget>
<output>75/4 = around 18.75</output>

<gadget id="calculator">11.8 + (75/4)</gadget>
<output>30.55</output>

<result>30.55</result>