A piece of triangular glass has a base of 26.5 decimeters and a height of 8 decimeters. If the price of glass per square decimeter is 0.2 yuan, how much will it cost to buy this piece of glass?
一块三角形的玻璃，底是26.5分米，高是8分米，如果每平方分米玻璃的价钱是0.2元，买这块玻璃要用多少钱？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">26.5 * 4 * 0.2</gadget>
<output>21.2</output>

<result>21.2</result>