A rectangular plank is 8 decimeters long and 5 decimeters wide. If it is sawed into a largest square plank, what percentage of the area of this plank is the original?
一块长方形木板长8分米，宽5分米．如果把它锯成一块最大的正方形木板，这块木板的面积是原来的百分之百几？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">5 / 40</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">5 * (1/8)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>