Xiaoming's family bought a house with a total price of 300,000 yuan. If the house payment is paid in full, there will be a 10% discount. Buying a house also pays a 1.5% deed tax, which is paid in one lump sum. How much is the house payment and deed tax in total?
小明家买了一套住房，房子总价为30万元，如果一次付清房款，就有九折的优惠价．买房还要缴纳1.5%的契税，一次性付清，房款和契税共要多少元？
<gadget id="calculator">30 * 10_000</gadget>
<output>300_000</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">300_000 * (9/10)</gadget>
<output>270_000</output>

<gadget id="calculator">1.5 / 100</gadget>
<output>0.015</output>

<gadget id="calculator">300_000 * (9/10) * 0.015</gadget>
<output>4_050</output>

<gadget id="calculator">270_000 + 4_050</gadget>
<output>274_050</output>

<result>274_050</result>