12 workers produce parts and it takes 4 days to produce 144 parts per day. Now a company needs to order 720 parts. How many days will it take to complete? (done with solution scale)
12个工人生产零件，生产4天，每天可以生产144个，现在一家公司需要订购720个零件，要多少天才能完成？(用解比例完成)
<gadget id="calculator">720 / 144</gadget>
<output>5</output>

<result>5</result>