If a figure is reduced by a ratio of 1:2, what is the original size of each side now.
把一个图形按1：2的比缩小，现在每条边是原来的多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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