For a trapezoidal steel plate, the sum of the upper and lower bases is 25.2 meters, which is 4 times the height. If the price of this steel plate is 80 yuan per square meter, how much does it cost to buy this steel plate?
一块梯形钢板，上、下底之和是25.2米，是高的4倍．如果这块钢板每平方米售价80元，购买这块钢板需要多少元？
<gadget id="calculator">25.2 / 4</gadget>
<output>6.3</output>

<gadget id="calculator">6.3 / 2</gadget>
<output>3.15</output>

<gadget id="calculator">25.2 * 3.15 * 80</gadget>
<output>6_350.4</output>

<result>6_350.4</result>