The original price of a suit is 400 yuan. After the first 20% discount, the price has been reduced by 50%. How much is the current price?
一套西服原价400元，第一次打8折后，再降价了50%，现价多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">400 * (4/5) * (1/2)</gadget>
<output>160</output>

<result>160</result>