There is a thin wire, (3/5) meters are used for the first time, (7/10) meters are used for the second time, and (3/8) meters are left, how many meters does this thin wire use?
有一根细线，第一次用去(3/5)米，第二次用去(7/10)米，还剩下(3/8)米，这根细线用去多少米？
<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">(3/5) + (7/10)</gadget>
<output>13/10 = around 1.3</output>

<result>13/10 = around 1.3</result>