The value of the formula ((1-(2/7))/(0.25+3*(1/4)))+((2*0.3)/(1.3-0.4)) is ((n)/(m)) , then what is the value of m+n.
算式((1-(2/7))/(0.25+3*(1/4)))+((2*0.3)/(1.3-0.4))的值为((n)/(m))，则m+n的值是多少．
<gadget id="calculator">29 + 21</gadget>
<output>50</output>

<result>50</result>