A cement factory produced 36.8 tons of cement on the first day, double that on the second day, and half of the production on the third day. How many tons of cement did the cement factory produce in these three days?
某水泥厂第一天生产水泥36.8吨，是第二天生产的2倍，是第三天生产的一半，水泥厂这三天共生产水泥多少吨？
<gadget id="calculator">36.8 / 2</gadget>
<output>18.4</output>

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

<gadget id="calculator">36.8 / (1/2)</gadget>
<output>73.6</output>

<gadget id="calculator">36.8 + 18.4 + 73.6</gadget>
<output>128.8</output>

<result>128.8</result>