Add 36 to the latter term of 5:6, how much should be added to the former term to keep the original ratio unchanged
在5﹕6的后项加36，要使原来的比值不变，前项应该加上多少
<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<gadget id="calculator">35 - 5</gadget>
<output>30</output>

<result>30</result>