After the price of a digital camera is reduced (1/5), it is 600 yuan. How much is it reduced?
一种数码相机降价(1/5)后是600元，降了多少元？
<gadget id="calculator">1 / 5</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">600 / (4/5)</gadget>
<output>750</output>

<gadget id="calculator">750 - 600</gadget>
<output>150</output>

<result>150</result>