A fruit shop stipulates that if the purchase of apples does not exceed 10 kilograms, the price per kilogram will be 3 yuan; if it exceeds 10 kilograms, then the excess price will be reduced by 1/10 per kilogram. A person bought 48 kilograms of fruit, how much should he pay.
某水果店规定：如果购买苹果不超过10千克，那么每千克售价3元；如果超过10千克，那么超过部分每千克降价(1/10)．某人买了48千克水果，他应付多少元钱．
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">48 - 10</gadget>
<output>38</output>

<gadget id="calculator">3 * (9/10) * 38</gadget>
<output>513/5 = around 102.6</output>

<gadget id="calculator">30 + (513/5)</gadget>
<output>663/5 = around 132.6</output>

<result>663/5 = around 132.6</result>