An electronics factory completed the plan (2/5) in the first half of October, and completed 75% of the plan in the second half of October. As a result, 30 units were overfulfilled. How many units were actually produced this month?
某电子厂十月份的上半月完成了计划的(2/5)，下半月完成了计划的75%，结果超额完成了30台，这个月实际生产了多少台？
<gadget id="calculator">2 / 5</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">30 / (3/20)</gadget>
<output>200</output>

<gadget id="calculator">200 + 30</gadget>
<output>230</output>

<result>230</result>