A wire is 20 meters long. (1/5) of the full length is used for the first time, and (2/5) meters are used for the second time. How many meters are used for the two times?
一根电线长20米，第一次用去全长的(1/5)，第二次用去(2/5)米，两次一共用去多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 * (1/5)</gadget>
<output>4</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 + (2/5)</gadget>
<output>22/5 = around 4.4</output>

<result>22/5 = around 4.4</result>