A piece of iron wire is 2 meters long, (3/5) meters are used for the first time, and (7/10) meters are used for the second time, how many meters are left?
一根铁丝长2米，第一次用(3/5)米，第二次用(7/10)米，还剩下多少米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">2 - (3/5) - (7/10)</gadget>
<output>7/10 = around 0.7</output>

<result>7/10 = around 0.7</result>