Xiaohua deposits the 100 yuan earned through work-study programs into the bank on a yearly basis, withdraws 50 yuan to buy school supplies after maturity, and deposits the remaining 50 yuan and the due interest in the bank on a yearly basis. The annual interest rate of the deposit is reduced to half of the original, so that the principal and interest and 63 yuan can be obtained after maturity. Find the annual interest rate of the first deposit (excluding interest tax).
小华将勤工俭学挣得的100元钱按一年定期存入银行，到期后取出50元来购买学习用品，剩下的50元和应得的利息又全部按一年定期存入银行，若存款的年利率又下调到原来的一半，这样到期后可得本息和63元，求第一次存款的年利率(不计利息税)．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>