factory has processed 80% of a batch of parts, and there are 24 left. How many parts will be processed in this batch?
一个工厂已经加工了一批零件的80%，还剩24个．这批零件要加工多少个？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">24 / (1/5)</gadget>
<output>120</output>

<result>120</result>