It is planned to build a 200-meter road. The full length (1/4) was built on the first day, and the full length (1/5) was built on the second day. How many meters were built in total in two days?
计划修一条200米的公路，第一天修了全长的(1/4)，第二天修了全长的(1/5)，两天一共修了多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) + (1/5)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">200 * (9/20)</gadget>
<output>90</output>

<result>90</result>