How many rectangular floor tiles with a length of 60 cm and a width of 40 cm should be used to pave the floor at least to form a square?
用长60厘米、宽40厘米的长方形地砖铺地，至少要多少块可以铺成一个正方形？
<gadget id="calculator">2 * 2 * 5 * 2 * 3</gadget>
<output>120</output>

<gadget id="calculator">120 / 60</gadget>
<output>2</output>

<gadget id="calculator">120 / 40</gadget>
<output>3</output>

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

<result>6</result>