A piece of rectangular paper with a length of 30 cm and a width of 18 cm should be divided into small squares of equal size without any residue. How many can be divided into at least
一张长30厘米，宽18厘米的长方形纸，要分成大小相等的小正方形，且没有剩余．最少可分成多少个
<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">30 / 6</gadget>
<output>5</output>

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

<result>15</result>