Teacher Wang deposited 8,000 yuan in the bank for 3 years, with an annual interest rate of 4.25%, and donated all the interest to the "Hope Project" after the maturity date. How much did he donate?
王老师将8000元钱存入银行，定期3年，年利率为4.25%，到期后将利息全部捐给"希望工程"．他捐资多少元钱？
<gadget id="calculator">4.25 / 100</gadget>
<output>0.0425</output>

<gadget id="calculator">8_000 * 0.0425 * 3</gadget>
<output>1_020</output>

<result>1_020</result>