To pave a 1,500-meter road, 40% of it was completed in the first 6 days. According to this calculation, how many days will it take to pave this road?
要铺1500米的公路，前6天完成了40%，照这样计算，铺完这条公路还要多少天？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/5) / 6</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(3/5) / (1/15)</gadget>
<output>9</output>

<result>9</result>