Huaxing Home Appliance Store sells a batch of electric fans of the same model, and sets the selling price at a price 20% higher than the purchase price, with an estimated profit of 9,000 yuan. Because the appearance of 20 of them was somewhat damaged, these 20 were sold at a discount of 15% of the sales price, so the actual profit was only 94% of the expected profit. How many electric fans are there in total?
华兴家电商店销售一批同一型号的电风扇，按高于进价20%的价格定销售价，预计获利9000元．由于其中20台的外表有些损伤，这20台按销售价打八五折卖出，因此实际获利只有预计获利的94%．这批电风扇共有多少台．
<gadget id="calculator">94 / 100</gadget>
<output>47/50 = around 0.94</output>

<gadget id="calculator">1 - (47/50)</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">(3/50) / 20</gadget>
<output>3/1_000 = around 0.003</output>

<gadget id="calculator">9_000 * (3/1_000)</gadget>
<output>27</output>

<gadget id="calculator">120 / 100</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">(6/5) * (17/20)</gadget>
<output>51/50 = around 1.02</output>

<gadget id="calculator">(6/5) - (51/50)</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">27 / (9/50)</gadget>
<output>150</output>

<gadget id="calculator">150 * (1/5)</gadget>
<output>30</output>

<gadget id="calculator">9_000 / 30</gadget>
<output>300</output>

<result>300</result>