A piece of rectangular glass is 60 centimeters long and 45 centimeters wide. This kind of glass costs 8 cents per square decimeter. How much does it cost to buy this piece of glass?
一块长方形玻璃长60厘米、宽45厘米，这种玻璃每平方分米8角钱．买这块玻璃要多少元钱？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 * (9/20) * (4/5)</gadget>
<output>108/5 = around 21.6</output>

<result>108/5 = around 21.6</result>