Master Wang processes 480 parts and completes them in 4 days. How many days will it take to process 720 parts at this speed?
王师傅加工480个，4天完成，照这样的速度加工720个零件，需要几天完成？
<gadget id="calculator">480 / 4</gadget>
<output>120</output>

<gadget id="calculator">720 / 120</gadget>
<output>6</output>

<result>6</result>