How many such small wooden boards are needed to form the smallest square with a small rectangular board with a length of 30 cm and a width of 12 cm?
用一种长30厘米、宽12厘米的长方形小木板拼成一个最小的正方形，需要多少块这样的小木板．
<gadget id="calculator">60 / 30</gadget>
<output>2</output>

<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<result>10</result>