To build a 500-meter-long railway, the full length (1/5) was built on the first day, and 30% of the total length was built on the second day. How many meters were built in two days?
修一条500米长的铁路，第一天修了全长的(1/5)，第二天修了全长的30%，两天共修了多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(1/5) + (3/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">500 * (1/2)</gadget>
<output>250</output>

<result>250</result>