If a piece of rectangular paper with a length of 30cm and a width of 18cm is to be divided into the same small squares, how many pieces can it be divided into at least?
一张长30cm，宽18cm的长方形纸，要分成同样的小正方形，最少可分成多少个
<gadget id="calculator">30 / 6</gadget>
<output>5</output>

<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>