In February 2009, Xiaohong's father deposited 20,000 yuan in the bank for one year, with an annual interest rate of 3.5%. How much can Xiaohong's father withdraw the principal and interest after the maturity date?
2009年2月小红的爸爸把20000元存入银行一年，年利率为3.5%．到期后小红的爸爸可以取出本金和利息共多少元？
<gadget id="calculator">3.5 / 100</gadget>
<output>0.035</output>

<gadget id="calculator">20_000 * 0.035 * 1</gadget>
<output>700</output>

<gadget id="calculator">20_000 + 700</gadget>
<output>20_700</output>

<result>20_700</result>