The fruit vendor wholesales 50 kilograms of apples at a price of 6.8 yuan per kilogram. After retailing them, the total quality is reduced by 4%, and the net profit is 63.2 yuan. How much is the retail price of the hawker?
水果小贩以每千克6.8元的价格批发进50千克苹果，零售出去后，总质量减少了4%，净赚了63.2元．小贩的零售价是多少元？
<gadget id="calculator">6.8 * 50</gadget>
<output>340</output>

<gadget id="calculator">340 + 63.2</gadget>
<output>403.2</output>

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1 - (1/25)</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">50 * (24/25)</gadget>
<output>48</output>

<gadget id="calculator">403.2 / 48</gadget>
<output>8.4</output>

<result>8.4</result>