A rectangular frame with a length of 14 decimeters and a width of 5 decimeters is stretched into a parallelogram, and the area is reduced by 28 square decimeters. What is the height of the drawn parallelogram in centimeters?
把一个长14分米，宽5分米的长方形框架拉成一个平行四边形，面积减少28平方分米，拉成的这个平行四边形的高是多少厘米．
<gadget id="calculator">14 * 5</gadget>
<output>70</output>

<gadget id="calculator">70 - 28</gadget>
<output>42</output>

<gadget id="calculator">42 / 14</gadget>
<output>3</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<result>30</result>