Lizhuang Village needs to build a 129.6-meter-long canal, and 43.2 meters have been built in the past two days. At this speed, how many days will it take to complete the canal?
李庄村要修一条长129.6米的水渠，前两天巳经修了43.2米，照这样的速度，修好这条水渠一共要多少天？
<gadget id="calculator">43.2 / 2</gadget>
<output>21.6</output>

<gadget id="calculator">129.6 / 21.6</gadget>
<output>6</output>

<result>6</result>