One base of a parallelogram is 21 decimeters, and the height corresponding to it is 6 decimeters. If the other base is 8 decimeters, what is the height corresponding to this base?
一个平行四边形的一条底是21分米，与它对应的高是6分米，如果它的另一条底是8分米，则与这条底对应的高是多少．
<gadget id="calculator">6 / 8</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">21 * (3/4)</gadget>
<output>63/4 = around 15.75</output>

<result>63/4 = around 15.75</result>