A tractor can cultivate 4.5 hectares of land in 3 hours. According to this calculation, how many hectares of land can be cultivated in 10 hours.
一台拖拉机3小时耕地4.5公顷，照这样计算，10小时可耕地多少公顷．
<gadget id="calculator">4.5 / 3</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 * 10</gadget>
<output>15</output>

<result>15</result>