One wire is (4/5) meters long and the other is (1/4) meters shorter, what is the total number of two wires in meters?
一根铁丝长(4/5)米，比另一根短(1/4)米，两根铁丝共多少米．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(4/5) + (1/4) + (4/5)</gadget>
<output>37/20 = around 1.85</output>

<result>37/20 = around 1.85</result>