Mom deposits 3,000 yuan in the bank for a fixed period of one year, with an annual interest rate of 2.70%.
妈妈存3000元钱到银行，定期一年，年利率2.70%，到期应得利息多少元．
<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</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">3_000 * 0.027 * 1 * (19/20)</gadget>
<output>76.95</output>

<result>76.95</result>