Uncle Li deposits a sum of money in the bank for one year, with an annual interest rate of 2.5%. How much is the bank?
李叔叔将一笔钱存入银行定期一年，年利率为2.5%，一年后，李叔叔从银行连本金共取出5100元(银行代扣了20%的利息税)，李叔叔存入银行多少元？
<gadget id="calculator">2.5 / 100</gadget>
<output>0.025</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">0.025 * (1/5)</gadget>
<output>0.005</output>

<gadget id="calculator">0.025 - 0.005</gadget>
<output>0.02</output>

<gadget id="calculator">1 + 0.02</gadget>
<output>1.02</output>

<gadget id="calculator">5_100 / 1.02</gadget>
<output>5_000</output>

<result>5_000</result>