The perimeter of a parallelogram iron sheet is 82cm, the length of one base is 16cm, the height of this base is 20cm, what is the height of the other side.
一块平行四边形的铁皮的周长是82cm，一条底边长16cm，这条底边上的高是20cm，求另一条边上的高是多少．
<gadget id="calculator">82 / 2</gadget>
<output>41</output>

<gadget id="calculator">41 - 16</gadget>
<output>25</output>

<gadget id="calculator">20 / 25</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">16 * (4/5)</gadget>
<output>64/5 = around 12.8</output>

<result>64/5 = around 12.8</result>