The area of the triangle is (2/7) square centimeters. The length of the base is (4/5) cm. What is the height of the triangle?
三角形的面积是(2/7)平方厘米．底边长是(4/5)厘米．三角形的高是多少？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</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">(2/7) * (5/2)</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>