Uncle Zhang deposits 40,000 yuan in the bank with a deposit period of one year and a monthly interest rate of 3.05%. After one year, Uncle Zhang will get a pre-tax interest of RMB 40,000.
张大爷把4万元钱存入银行，存期一年，月利率是3.05%，一年后张大爷可获得税前利息多少元．
<gadget id="calculator">4 * 10_000</gadget>
<output>40_000</output>

<gadget id="calculator">3.05 / 100</gadget>
<output>0.0305</output>

<gadget id="calculator">40_000 * 0.0305 * 12</gadget>
<output>14_640</output>

<result>14_640</result>