The dealer sells a computer for 4,800 yuan, and the profit rate is 20%. What is the purchase price of this computer?
经销商将一台电脑以4800元卖出，盈利率20%，求这台电脑的进价是多少？
<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">4_800 / (6/5)</gadget>
<output>4_000</output>

<result>4_000</result>