This year's Spring Festival, my father went to Xima Rural Commercial Bank to deposit 20,000 yuan, fixed for 2 years, with an annual interest rate of 3.15%. How much yuan can he get back when it expires?
今年春节爸爸去洗马农商银行存了20000元，定期2年，年利率为3.15%，到期时，他可以取回多少元．
<gadget id="calculator">3.15 / 100</gadget>
<output>0.0315</output>

<gadget id="calculator">20_000 * 0.0315 * 2</gadget>
<output>1_260</output>

<gadget id="calculator">20_000 + 1_260</gadget>
<output>21_260</output>

<result>21_260</result>