Usually selling a Konka color TV priced at 1,840 yuan, the merchant can earn 15%, and now it is sold at 1,680 yuan. How much did the merchant earn (or lose)?
平时卖一台售价为1840元的康佳彩电，商家可赚15%，现在以1680元卖出．商家时赚了(或亏了)多少元？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">1_840 / (23/20)</gadget>
<output>1_600</output>

<gadget id="calculator">1_680 - 1_600</gadget>
<output>80</output>

<result>80</result>