Define the operation * as a*b=((a+b)/(ba)), and 3*m=4, then what is the value of m
定义运算*为a*b=((a+b)/(b-a))，且3*m=4，那么m的值是多少
<gadget id="calculator">3 + 12</gadget>
<output>15</output>

<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<result>5</result>