The area of a triangle is (4/15) square meters, its base is (4/5) meters, what is its height.
一个三角形的面积是(4/15)平方米，它的底是(4/5)米，高是多少．
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

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

<gadget id="calculator">2 / (4/5)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(4/15) * (5/2)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>