total of 20 pieces of glass with a length of 60 cm and a width of 50 cm are installed in a newly built classroom. What is the total area of these glasses?
一个新建的教室一共安装了20块长60厘米，宽50厘米的玻璃，这些玻璃的面积一共是多少平方米？
<gadget id="calculator">50 / 10_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">60 * (1/200) * 20</gadget>
<output>6</output>

<result>6</result>