18 roses are planted in each row, and 12 rows can be planted. If planted in 9 rows, how many roses will there be in each row?
月季花每行栽18棵，可以栽12行．如果栽成9行，每行会有多少棵月季花？
<gadget id="calculator">18 * 12</gadget>
<output>216</output>

<gadget id="calculator">216 / 9</gadget>
<output>24</output>

<result>24</result>