There are 5 red balls and 7 green balls. It is wrong to say that there are as many red balls as there are green balls.
红球有5个，绿球有7个，下面说法错误的是红球个数的多少与绿球一样多．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 / (5/7)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">1 / (7/5) / 7</gadget>
<output>5/49 = around 0.102041</output>

<gadget id="calculator">7 * (5/49)</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>