Cut a rectangular composite board with a length of 90 cm and a width of 60 cm into squares of the same size without any surplus, at least how many pieces can be cut?
把一张长90厘米，宽60厘米的长方形复合板裁成一样大小的正方形方块而没有剩余，至少能裁多少个？
<gadget id="calculator">90 / 30</gadget>
<output>3</output>

<gadget id="calculator">60 / 30</gadget>
<output>2</output>

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

<result>6</result>