The natural numbers a and b satisfy (1/(a))-(1/(b))=(1/182), a:b=7:13, then a+b=how much.
自然数a、b满足(1/(a))-(1/(b))=(1/182)，a：b=7：13则a+b=多少．
<gadget id="calculator">84 + 156</gadget>
<output>240</output>

<result>240</result>