A piece of wood, the full length (3/8) is used for the first time, 2.2 meters is used for the second time, and the full length (5/6) is used for the two times, how many meters is used for the first time?
一根木料，第一次用去全长的(3/8)，第二次用去2.2米，两次共用全长的(5/6)，第一次用去多少米？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/6) - (3/8)</gadget>
<output>11/24 = around 0.458333</output>

<gadget id="calculator">2.2 / (11/24)</gadget>
<output>4.8</output>

<gadget id="calculator">4.8 * (3/8)</gadget>
<output>1.8</output>

<result>1.8</result>