A kind of stereo, due to the improved function, the price of each unit is increased by 20%, the current price is 3600 yuan, how much is the original price?
一种音响，由于改进了功能，每台涨价20%，现价售价是3600元，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>6/5 = around 1.2</output>

<gadget id="calculator">3_600 / (6/5)</gadget>
<output>3_000</output>

<result>3_000</result>