Xiaoli deposited 300 yuan in the bank on October 24 last year. When she withdraws it on April 24 this year, she will get 36 yuan in after-tax interest. What is the monthly interest rate?
小莉去年10月24日把300元钱存入银行，到今年4月24日取出时，得到36元税后利息，月利率是多少．
<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">300 * 6 * (4/5)</gadget>
<output>1_440</output>

<gadget id="calculator">36 / 1_440</gadget>
<output>1/40 = around 0.025</output>

<result>1/40 = around 0.025</result>