The area of a rectangle is (8/5) square meters, the length is 4 meters, and the width is how many meters.
一个长方形面积是(8/5)平方米，长是4米，宽多少米．
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(8/5) / 4</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>