Xiao Ming's family deposited 10,000 yuan in China Construction Bank in February last year, with a deposit period of one year. In February this year, the principal and interest were withdrawn in total of 10393.3. What is the annual interest rate of China Construction Bank?
小明家去年2月在建设银行存款10000元，存期一年，今年2月本息共取出10393.3，建设银行的年利率是多少．
<gadget id="calculator">10_393.3 - 10_000</gadget>
<output>393.3</output>

<gadget id="calculator">393.3 / 1 / 10_000</gadget>
<output>0.03933</output>

<result>0.03933</result>