5: Add 6 to the latter term of 3, if the ratio remains the same, how much should the former term be multiplied
5：3的后项加上6，要是比值不变，前项应该乘多少
<gadget id="calculator">3 + 6</gadget>
<output>9</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<result>3</result>