A triangle and a parallelogram have the same area and the same base. It is known that the height of the parallelogram is 40 centimeters. What is the height of the triangle in decimeters?
一个三角形和一个平行四边形面积相等，底也相等，已知平行四边形的高是40厘米，那么三角形的高是多少分米．
<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<result>8</result>