Master Zhang processed 30 parts and completed them all in 4 days. On average, Master Zhang completes ((())/(())) of this batch of parts every day.
张师傅加工30个零件，4天全部完成．张师傅平均每天完成这批零件的((())/(()))．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>