Mom deposits 20,000 yuan in the bank. The deposit period is two years and the annual interest rate is 3.50%.
妈妈把20000元钱存入银行，存期为两年，年利率为3.50%，到期后妈妈可得到利息多少元．
<gadget id="calculator">3.5 / 100</gadget>
<output>0.035</output>

<gadget id="calculator">20_000 * 0.035 * 2</gadget>
<output>1_400</output>

<result>1_400</result>