A rectangular part is drawn on the drawing according to the scale of 1:50. The length is 15 cm and the width is 8 cm. Find the actual area of this part in square meters.
一个长方形零件，按比例尺1：50将它画在图纸上，长是15厘米，宽是8厘米，求这个零件的实际面积是多少平方米．
<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">15 / (1/50) / 100</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">8 / (1/50) / 100</gadget>
<output>4</output>

<gadget id="calculator">(15/2) * 4</gadget>
<output>30</output>

<result>30</result>