house is 6 meters long and 3 meters wide. If you use square tiles with a side length of 60 cm to lay the house, how many such tiles are needed?
一间房子长6米，宽3米，如果用边长为60厘米的正方形瓷砖铺这间房子需要多少块这样的瓷砖？
<gadget id="calculator">60 * 60</gadget>
<output>3_600</output>

<gadget id="calculator">10_000 / 3_600</gadget>
<output>25/9 = around 2.777778</output>

<gadget id="calculator">6 * 3 * (25/9)</gadget>
<output>50</output>

<result>50</result>