The water company lays a 500-meter-long water pipe. On the first day, it lays 120 meters, and on the second day it lays the same length as the first day. How many meters do you need to lay?
自来水公司铺设一条500米长的自来水管道，第一天铺了120米，第二天铺的与第一天同样长．还要铺多少米？
<gadget id="calculator">500 - 120 - 120</gadget>
<output>260</output>

<result>260</result>