During the "May 1st" period, the price of a computer was reduced by 20% in the shopping mall, and each computer is now priced at 3,600 yuan. How much is the original price of this computer?
"五一"期间商场降价20%出售一种电脑，每台现在售价3600元．这种电脑的原价是多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3_600 / (4/5)</gadget>
<output>4_500</output>

<result>4_500</result>