When processing a batch of parts, the number of processed parts is 40% of the number of unprocessed parts. If 22 more parts are processed, 60% of the total number of parts will be processed. How many parts are there in this batch?
加工一批零件，已经加工的零件个数是没有加工的零件个数的40%，如果再加工22个，正好加工了零件总数的60%，问这批零件共有多少个？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(2/5) / (7/5)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/5) - (2/7)</gadget>
<output>11/35 = around 0.314286</output>

<gadget id="calculator">22 / (11/35)</gadget>
<output>70</output>

<result>70</result>