Mr. Wang deposits 3,000 yuan in the bank for 2 years, and the annual interest rate is calculated at 2.5%.
王老师把3000元存入银行，定期2年，年利率按2.5%计算，到期可得本金和税后利息共多少元．
<gadget id="calculator">2.5 / 100</gadget>
<output>0.025</output>

<gadget id="calculator">3_000 * 0.025 * 2</gadget>
<output>150</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">150 * (19/20)</gadget>
<output>285/2 = around 142.5</output>

<gadget id="calculator">3_000 + (285/2)</gadget>
<output>6_285/2 = around 3_142.5</output>

<result>6_285/2 = around 3_142.5</result>