A rectangular piece of paper is 18 cm long and 12 cm wide. If you cut it into a square of the same size with a side length equal to an integer number of centimeters, how many pieces can you cut at least?
一块长方形纸片，长18厘米，宽12厘米，把它剪成同样大小的边长是整厘米数的正方形且没有剩余，最少可以剪多少个？
<gadget id="calculator">2 * 3 * 2 * 3</gadget>
<output>36</output>

<gadget id="calculator">12 / 36</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 * (1/3)</gadget>
<output>6</output>

<result>6</result>