How many square meters does a floor tile with a side length of 50 cm occupy?
边长50厘米的地瓷砖，占地多少平方米．
<gadget id="calculator">50 / 10_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">50 * (1/200)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>