The turnover of a clothing counter in Hangzhou Building was 8.1 million yuan in the third quarter of last year. Due to the impact of the economic crisis, the turnover in the fourth quarter decreased by 20% compared with the third quarter. How much is the total turnover of the clothing counter in the two quarters?
杭州大厦某服装柜台去年第三季度的营业额为810万元，由于受经济危机影响，第四季度的营业额比第三季度下降20%，该服装柜台两个季度的营业额共多少万元？
<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">810 * (4/5)</gadget>
<output>648</output>

<gadget id="calculator">648 + 810</gadget>
<output>1_458</output>

<result>1_458</result>