There is a batch of floor tiles with a length of 36 cm and a width of 24 cm. At least how many of these floor tiles are needed to form a solid square?
有一批地砖，长36厘米，宽24厘米，至少用多少块这样的地砖才能铺成一个实心的正方形？
<gadget id="calculator">2 * 2 * 2 * 3 * 3</gadget>
<output>72</output>

<gadget id="calculator">72 / 36</gadget>
<output>2</output>

<gadget id="calculator">72 / 24</gadget>
<output>3</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>