Mr. Li bought a new house with a house price of 450,000 yuan. He paid 30% of the house price in the first installment, and repaid the rest with a loan. In addition to repaying the bank loan, Mr. Li also has to pay interest. The loan is 10 years, and the monthly principal and interest are 3689.96 yuan. In the past 10 years, how much interest will Mr. Li pay to the bank every month?
李老师购买了一套新房子，房价45万元，他首期付了30%的房价款，剩余部分用贷款的方式还款．李老师除了还银行贷款外还要付利息，贷款10年，每月需付本息共3689.96元．这10年内，李老师每月要付给银行利息多少元？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">450_000 * (7/10)</gadget>
<output>315_000</output>

<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<gadget id="calculator">315_000 / 120</gadget>
<output>2_625</output>

<gadget id="calculator">3_689.96 - 2_625</gadget>
<output>1_064.96</output>

<result>1_064.96</result>