Chi'an Automobile Factory completed 40% of the monthly plan in the first half of July, and 75% of the monthly plan in the second half of July. As a result, 6 units were overfulfilled. How many units do you plan to produce in July?
赤岸汽车厂七月份上半月完成月计划的40%，下半月完成月计划的75%，结果超额完成6台．七月份计划生产多少台？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) - 1</gadget>
<output>-1/4 = around -0.25</output>

<gadget id="calculator">(2/5) + (-1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">6 / (3/20)</gadget>
<output>40</output>

<result>40</result>