Xiao Ming's father deposits 2,000 yuan at an interest rate of 4% for five years. What is the interest due when it matures?
小明的爸爸把2000元钱按4%的利率存五年，到期时应得的利息是多少元．
<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">2_000 * (1/25) * 5</gadget>
<output>400</output>

<result>400</result>