A parallelogram and an isosceles triangle have the same area. The length of the base of the isosceles triangle is 12 cm, and the height corresponding to this base is 5 cm; the base of the parallelogram iron sheet is 0.3 decimeters, how many decimeters is the height corresponding to this base?
一块平行四边形铁皮与一块等腰三角形铁皮的面积相等．等腰三角形铁皮的底边长是12厘米，与这条底相对应的高是5厘米；平行四边形铁皮的底是0.3分米，与这条底相对应的高是多少分米？
<gadget id="calculator">5 / 2 / 100</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">12 * (1/40)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) / (3/10)</gadget>
<output>1</output>

<result>1</result>