The water supply company laid a 1400-meter-long water supply pipeline, and 15% of the total length was laid in the first 3 days. According to this calculation, how many days will it take to complete the pipeline?
自来水公司铺设一条长1400米的供水管道，前3天铺了全长的15%，照这样计算，铺完管道一共要多少天？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/20) / 3</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / (1/20)</gadget>
<output>20</output>

<result>20</result>