There is a triangular grass field, the area is (7/4) square meters, the height is (5/6) meters, and the bottom is how many meters.
有一片三角形草地，面积是(7/4)平方米，高是(5/6)米，底是多少米．
<gadget id="calculator">7 / 4</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 / (5/6)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">(7/4) * (12/5)</gadget>
<output>21/5 = around 4.2</output>

<result>21/5 = around 4.2</result>