Ling Repair Factory processes a batch of parts, 24 pieces per day, and half of all parts are completed in 5 days. The rest process 30 pieces per day. How many days will it take to complete this batch of parts?
岭修配厂加工一批零件，每天做24件，5天做完全部零件的一半．余下的每天加工30件，一共需要多少天能完成这批零件？
<gadget id="calculator">5 / 30</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">24 * (1/6)</gadget>
<output>4</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<result>9</result>