Teacher Wang's home is far away from the school, and it is inconvenient to take the bus to work every day. She plans to pay for the car in installments. The current price of the Buick she chose is 150,000 yuan, according to regulations, she has to pay 3/10, and the rest can be borrowed from the bank. How much does Mr. Wang want to borrow?
王老师家离学校很远，每天乘公交车上班很不方便，她打算分期付款买车．她选中的别克轿车现价是15万元，按规定她得首付(3/10)，余下部分可向银行贷款．王老师要贷款多少钱？
<gadget id="calculator">3 / 10</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">15 * (7/10)</gadget>
<output>21/2 = around 10.5</output>

<result>21/2 = around 10.5</result>