Mom deposits 3,000 yuan in the bank, and deposits and withdraws it in lump sum for 2 years. If the annual interest rate is 2.45%, she will get a total of 2.45% of the principal, interest and interest when it matures.
妈妈把3000元钱存入银行，定期整存整取2年，如果年利率为2.45%，到期时她可得本金利税后利息共多少元．
<gadget id="calculator">2.45 / 100</gadget>
<output>0.0245</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">3_000 * 0.0245 * 2 * (4/5)</gadget>
<output>117.6</output>

<gadget id="calculator">117.6 + 3_000</gadget>
<output>3_117.6</output>

<result>3_117.6</result>