A triangular road traffic warning sign has an area of 35.1dm**2 and a base of 9dm. What is its height in dm?
一块三角形道路交通警示标志牌面积是35.1dm**2，底是9dm，它的高是多少dm．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">35.1 * (2/9)</gadget>
<output>7.8</output>

<result>7.8</result>