Xiao Ming deposits 400 yuan in the bank with a deposit period of two years and an annual interest rate of 4.5%. How much can he get back the principal and interest after maturity?
小明将400元存入银行，存期两年，年利率是4.5%，到期后可取回本金和利息共多少元．
<gadget id="calculator">4.5 / 100</gadget>
<output>0.045</output>

<gadget id="calculator">400 * 0.045 * 2</gadget>
<output>36</output>

<gadget id="calculator">400 + 36</gadget>
<output>436</output>

<result>436</result>