A rectangular vegetable field is 15 meters long and 6 meters wide. A total of 1,170 kilograms of cabbage was harvested in this vegetable field. How many kilograms of cabbage were harvested on average per square meter?
一块长方形菜地，长15米，宽6米，在这块菜地里一共收了1170千克白菜，平均每平方米收白菜多少千克？
<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<gadget id="calculator">1_170 / 90</gadget>
<output>13</output>

<result>13</result>