From June 5, 2007, the one-year fixed deposit interest rate was raised to 3.06%. Zhang Hua deposited RMB 5,000 for one year on June 5, 2007 (the bank will deduct 20% interest tax after maturity), and the bank should pay Zhang Hua the amount of after-tax interest after maturity.
从2007年6月5日起，一年定期存款利率上调到3.06%．张华于2007年6月5日存入定期1年的人民币5000元(到期后银行将扣除20%的利息税)，则到期后银行应向张华支付税后利息多少元．
<gadget id="calculator">3.06 / 100</gadget>
<output>0.0306</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5_000 * 0.0306 * 1 * (4/5)</gadget>
<output>122.4</output>

<result>122.4</result>