Teacher Zhang bought 10,000 yuan of national construction bonds, fixed for five years, with an annual interest rate of 3.60%. How much can he get back at maturity? (no tax on interest)
张老师买了10000元的国家建设债券，定期五年，年利率为3.60%．到期时他可以取回多少元？(不缴纳利息税)
<gadget id="calculator">3.6 / 100</gadget>
<output>0.036</output>

<gadget id="calculator">10_000 * 0.036 * 5</gadget>
<output>1_800</output>

<gadget id="calculator">10_000 + 1_800</gadget>
<output>11_800</output>

<result>11_800</result>