There is a project to lay a cable. The whole area (1/4) was laid in the first week, and 20 meters more than the first week was laid in the second week. In the end, 180 meters were left unpaved. What is the total length of this road? rice?
有一项工程要铺设一条电缆，第一周铺设了全场的(1/4)，第二周比第一周多铺了20米，最后还剩180米没有铺，问这条公路全长多少米？
<gadget id="calculator">180 + 20</gadget>
<output>200</output>

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

<gadget id="calculator">(1/4) + (1/4)</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">200 / (1/2)</gadget>
<output>400</output>

<result>400</result>