Li Liang's mother deposited 20,000 yuan in the bank for a period of two years. Calculated at an annual interest rate of 2.50%, how much yuan can she get the principal and interest when it matures? (Interest is not taxable)
李亮的妈妈在银行存了2万元钱，存期两年，按年利率2.50%计算，到期时她能取得本金和利息共多少元．(利息不缴税)
<gadget id="calculator">2 * 10_000</gadget>
<output>20_000</output>

<gadget id="calculator">2.5 / 100</gadget>
<output>0.025</output>

<gadget id="calculator">20_000 * 0.025 * 2</gadget>
<output>1_000</output>

<gadget id="calculator">20_000 + 1_000</gadget>
<output>21_000</output>

<result>21_000</result>