Master Li processes a batch of parts, and just completes (1/5) of this batch of parts in 4 days. It is known that Master Li processes 60 parts every day, how many parts are there in total in this batch.
李师傅加工一批零件，4天正好完成这批零件的(1/5)，已知李师傅每天加工60个零件，这批零件一共有多少个．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 / (1/5)</gadget>
<output>300</output>

<gadget id="calculator">4 * 300</gadget>
<output>1_200</output>

<result>1_200</result>