The price of a computer is 3,600 yuan after a 10% discount and a 20% discount. What is the original price of this computer?
一台电脑先打九折，再打八折后售价为3600元，这台电脑的原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">3_600 / (4/5) / (9/10)</gadget>
<output>5_000</output>

<result>5_000</result>