piece of square cloth can be made into square scarves with a side length of 6 cm, or can be made into square scarves with a side length of 10 cm, and there is no surplus. What is the minimum length of the side of this square piece of cloth?
一块正方形布料，既可以都做成边长是6厘米的方巾，也可以都做成边长是10厘米的方巾，都没有剩余．这块正方形布料的边长至少是多少厘米？
<gadget id="calculator">2 * 3 * 5</gadget>
<output>30</output>

<result>30</result>