The engineering team wants to build a 500-meter-long canal. In fact, the full length (1/4) was repaired in 5 days. According to this calculation, how many days will it take for the engineering team to complete the canal? (answer in at least 2 ways)
工程队要修一条长500米的水渠．实际5天修了全长的(1/4)，照这样计算，这个工程队修完这条水渠还要用多少天？(至少用2种方法解答)
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) / (1/4)</gadget>
<output>3</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>