Grandma Li bought treasury bonds with 50,000 yuan five years ago. The deposit period was 5 years. The annual interest rate was 3.14%. (Note: Calculated on the basis of non-payment of tax)
李奶奶5年前用5万元买了国债，存期为5年，当时年利率为3.14%，今年李奶奶一共可以拿到多少元．(注明：按不交税计算)
<gadget id="calculator">5 * 10_000</gadget>
<output>50_000</output>

<gadget id="calculator">3.14 / 100</gadget>
<output>0.0314</output>

<gadget id="calculator">50_000 * 0.0314 * 5</gadget>
<output>7_850</output>

<gadget id="calculator">50_000 + 7_850</gadget>
<output>57_850</output>

<result>57_850</result>