Mom deposits 4,000 yuan in the bank, deposits and withdraws for three years, and the annual interest rate is 2.70%. When it expires, mother can get back the total amount of principal and interest.
妈妈把4000元钱存入银行，整存整取三年，年利率是2.70%，到期时妈妈可以取回本金和利息一共多少元．
<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</output>

<gadget id="calculator">4_000 * 0.027 * 3</gadget>
<output>324</output>

<gadget id="calculator">324 + 4_000</gadget>
<output>4_324</output>

<result>4_324</result>