One is 6 than the former item, if the former item is increased by 18, what should be the latter item to keep the ratio constant
一个比前项是6，如果前项增加18，要使比值不变，后项应该多少
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>