A board is 4 meters long and its width is long (9/16). What is the area of this board in square meters?
一块木板长4米，宽是长的(9/16)．这块木板的面积是多少平方米？
<gadget id="calculator">9 / 16</gadget>
<output>9/16 = around 0.5625</output>

<gadget id="calculator">4 * 4 * (9/16)</gadget>
<output>9</output>

<result>9</result>