Teacher Wang went to the woodware factory to order 240 sets of desks and chairs, each priced at 80 yuan. Teacher Wang said to the factory manager: "If the price of one set of desks and chairs is reduced by 1 yuan, I will order 10 more sets." The factory manager thought about it. Thinking, the profit obtained by reducing the price of each set of tables and chairs by 10% is the same as the profit obtained by not reducing the price, so I agreed to Teacher Wang's request, so how much is the cost of each set of tables and chairs?
王老师到木器厂去定做240套课桌椅，每套定价80元，王老师对厂长说："如果1套桌椅每减价1元，我就多定10套．"厂长想了想，每套桌椅减价10%所获得的利润与不减价所获得的利润同样多，于是答应了王老师的要求，那么每套桌椅的成本是多少？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 * (1/10) * 10 * 240</gadget>
<output>19_200</output>

<gadget id="calculator">80 * (1/10) * 10 * 80 * (1/10) * 10</gadget>
<output>6_400</output>

<gadget id="calculator">80 * (1/10) * 240</gadget>
<output>1_920</output>

<gadget id="calculator">80 * (1/10) * 80 * (1/10) * 10</gadget>
<output>640</output>

<gadget id="calculator">240 * 80 * (1/10) * 10</gadget>
<output>19_200</output>

<gadget id="calculator">6_400 - 1_920 - 640 - 19_200</gadget>
<output>-15_360</output>

<gadget id="calculator">19_200 + (-15_360)</gadget>
<output>3_840</output>

<gadget id="calculator">80 * (1/10) * 10</gadget>
<output>80</output>

<gadget id="calculator">80 - 240</gadget>
<output>-160</output>

<gadget id="calculator">240 + (-160)</gadget>
<output>80</output>

<gadget id="calculator">3_840 / 80</gadget>
<output>48</output>

<result>48</result>