The natural numbers A and B satisfy (1/(A))-(1/(B))=(1/182), and A:B=7:13. So, how much is A+B=.
自然数A、B满足(1/(A))-(1/(B))=(1/182)，且A：B=7：13．那么，A+B=多少．
<gadget id="calculator">7 + 13</gadget>
<output>20</output>

<gadget id="calculator">20 * 12</gadget>
<output>240</output>

<result>240</result>