The road repair team repaired a 100-meter road. On the first day, (1/5) was repaired, and the rest (1/2) was repaired on the second day. How many meters are left to be repaired?
修路队修一段100米路，第一天修了(1/5)，第二天修了余下的(1/2)，还有多少米没有修？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">100 * (4/5) * (1/2)</gadget>
<output>40</output>

<result>40</result>