Mr. Li deposits 100,000 yuan in the bank, and the monthly interest rate is 0.18%. 20% interest tax will be paid upon deposit for one year. How much is the after-tax sum of principal and interest deposited in the bank by Mr. Li in one year?
李先生存入银行10万元，月利率是0.18%．存满一年到期支付20%的利息税．求李先生一年后存入银行的税后本息和是多少元？
<gadget id="calculator">10 * 10_000</gadget>
<output>100_000</output>

<gadget id="calculator">0.18 / 100</gadget>
<output>0.0018</output>

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

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100_000 * 0.0018 * 12 * (4/5)</gadget>
<output>1_728</output>

<gadget id="calculator">100_000 + 1_728</gadget>
<output>101_728</output>

<result>101_728</result>