Xiaohong tied 12 red flowers and 9 yellow flowers into a bouquet. If there are the same number of red flowers and the same number of yellow flowers in each bouquet, how many flowers are there in each bouquet?
小红用12朵红花和9朵黄花扎成花束．如果每个花束里红花的朵数相同，黄花的朵数也相同，每个花束至少有几朵花？
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<result>7</result>