A parallelogram vegetable field has an area of 156 square meters. It is known that the base length of the parallelogram is 13m and the height is m.
一块平行四边形菜地，面积是156平方米，已知平行四边形的底长13m，高是多少m．
<gadget id="calculator">156 / 13</gadget>
<output>12</output>

<result>12</result>