Jiangdong built a 600-meter-long canal. On the first day, the full length (2/5) was built, and on the second day, the full length (1/4) was built. How many meters were repaired in total?
江东修一条长600米的水渠，第一天修了全长的(2/5)，第二天修了全长的(1/4)．一共修了多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) + (1/4)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">600 * (13/20)</gadget>
<output>390</output>

<result>390</result>