Dad bought a piece of parallelogram glass, the bottom side is 1.6 meters long, and the height is 1/2 of the bottom length. If the price of glass per square meter is 40 yuan, how much does this piece of glass cost?
爸爸买来一块平行四边形的玻璃，底边长1.6米，高是底长的(1/2)，如果每平方米的玻璃价格是40元，这块玻璃一共要多少钱？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1.6 * (1/2)</gadget>
<output>0.8</output>

<gadget id="calculator">1.6 * 0.8 * 40</gadget>
<output>51.2</output>

<result>51.2</result>