The original price of a household appliance is 600 yuan, but now it has been reduced by 20%. How much is the current price?
一种家用电器原价600元，现在降低了20%，现价多少元？
<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">600 * (4/5)</gadget>
<output>480</output>

<result>480</result>