The full length of a colored ribbon is (4/5) meters, the first time (1/4) of the full length is used, and the second (3/8) of the full length is used. After two uses, the colored ribbon is still What fraction of the full length is left?
一根彩带全长(4/5)米，第一次用去全长的(1/4)，第二次用去全长的(3/8)，用了两次后，这根彩带还剩下全长的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) + (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>