The living room of Mr. Wang's newly purchased house is drawn on the 1:50 drawing, which is a square with a side length of 10 cm. How many square meters is the living room of Teacher Wang's house actually?
王老师家新购住房的客厅画在1：50的图纸上，是一个边长10厘米的正方形．王老师家的客厅实际有多少平方米．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">50 * (1/10) * 50 * (1/10)</gadget>
<output>25</output>

<result>25</result>