On May 12, 2007, Mr. Zhang deposited 60,000 yuan in the bank for a period of one year. After the maturity, he donated the after-tax interest to the disaster area. The annual interest rate is 2.25%, and the interest tax is 5%. How much did Mr. Zhang donate? money?
2007年5月12日张老师将6万元钱存入银行，存期一年，到期后将税后利息捐给灾区，年利率是2.25%，利息税是5%，张老师捐了多少钱？
<gadget id="calculator">6 * 10_000</gadget>
<output>60_000</output>

<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">60_000 * 0.0225 * 1 * (19/20)</gadget>
<output>1_282.5</output>

<result>1_282.5</result>