A piece of iron wire, cut off 28% of the total length for the first time, cut off 8.8 meters for the second time, and cut off half of the total length twice. How many meters was cut off for the first time?
一根铁丝，第一次截去全长的28%，第二次截去8.8米，两次刚好截去全长的一半．第一次截去多少米？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">28 / 100</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">(1/2) - (7/25)</gadget>
<output>11/50 = around 0.22</output>

<gadget id="calculator">8.8 / (11/50)</gadget>
<output>40</output>

<gadget id="calculator">40 * (7/25)</gadget>
<output>56/5 = around 11.2</output>

<result>56/5 = around 11.2</result>