The area of a living room is 18 square meters. If you use 50cm square floor tiles to pave the floor, how many such floor tiles are needed at least?
一间客厅的面积是18㎡，如果用变成50cm的正方形地砖铺地面，至少需要多少块这样的地砖？
<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>

<gadget id="calculator">18 / (1/4)</gadget>
<output>72</output>

<result>72</result>