There is a piece of triangular glass with a base length of 50dm and a height of 30dm. If the glass costs 30 yuan per square meter, how much does it cost to buy such a piece of glass?
有一块三角形的玻璃，底边长50dm，高是30dm，如果每平方米玻璃30元，买这样一块玻璃需要多少元？
<gadget id="calculator">30 / 2 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">50 * (3/20) * 30</gadget>
<output>225</output>

<result>225</result>