Mom has deposited 40,000 yuan in the bank for three years, with an annual interest rate of 4.75%. How much is the pre-tax interest at maturity?
妈妈在银行存了4万元，定期三年，年利率是4.75%，到期税前利息多少元．
<gadget id="calculator">4 * 10_000</gadget>
<output>40_000</output>

<gadget id="calculator">4.75 / 100</gadget>
<output>0.0475</output>

<gadget id="calculator">40_000 * 0.0475 * 3</gadget>
<output>5_700</output>

<result>5_700</result>