The base of the triangle is (4/5) cm, the height is (5/4) cm, what is its area?
三角形底是(4/5)cm，高(5/4)cm，它的面积是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) / 2</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(4/5) * (5/8)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>