If a figure is reduced by a ratio of 1:5, the length of each side of the reduced figure is equal to the length of the original figure.
把一个图形按1：5的比缩小，缩小后的图形每条边长是原来图形的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>