certain commodity is priced at a profit of 25% of the cost, and then sold with a 10% discount to attract customers, resulting in a profit of 700 yuan for the merchant. What is the cost price of this commodity.
某种商品按成本的25%的利润为定价，然后为吸引顾客又打着九折的优惠措施卖出，结果商家获利700元．这种商品的成本价是多少元．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(5/4) * (9/10)</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">(9/8) - 1</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">700 / (1/8)</gadget>
<output>5_600</output>

<result>5_600</result>