If a commodity is sold at a 5% discount, a profit of 525 yuan can be obtained. If you sell it at 25% off the price, you will lose 175 yuan, so what is the cost price of this commodity.
一种商品，如果降价5%卖出，可得525元的利润．如果按定价的七五折卖，就会亏175元，那么这种商品的成本价是多少元．
<gadget id="calculator">525 + 175</gadget>
<output>700</output>

<gadget id="calculator">0.95 - 0.75</gadget>
<output>0.2</output>

<gadget id="calculator">700 / 0.2</gadget>
<output>3_500</output>

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

<gadget id="calculator">3_500 * (3/4)</gadget>
<output>2_625</output>

<gadget id="calculator">2_625 + 175</gadget>
<output>2_800</output>

<result>2_800</result>