If a computer is sold at a 10% discount, it can make a profit of 425 yuan. If it is sold at a 15% discount, it will lose 225 yuan. What is the purchase price of this computer?
一种电脑，如果降低定价的10%出售，可盈利425元，如果降低定价的15%出售，就亏本225元，这种电脑的进价是多少元？
<gadget id="calculator">225 + 425</gadget>
<output>650</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">(9/10) - (17/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">650 / (1/20)</gadget>
<output>13_000</output>

<gadget id="calculator">13_000 * (17/20)</gadget>
<output>11_050</output>

<gadget id="calculator">11_050 + 225</gadget>
<output>11_275</output>

<result>11_275</result>