Deposit 3,000 yuan in the bank for two years, with an annual interest rate of 2.79%, how much is the real interest after maturity.
把3000元钱存入银行两年，年利率2.79%，到期后实得利息多少元．
<gadget id="calculator">2.79 / 100</gadget>
<output>0.0279</output>

<gadget id="calculator">3_000 * 0.0279 * 2</gadget>
<output>167.4</output>

<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">167.4 * (4/5)</gadget>
<output>133.92</output>

<result>133.92</result>