Known: (1/(a))=((a)/(b))=(1/7), then a+b=how much.
已知：(1/(a))=((a)/(b))=(1/7)，则a+b=多少．
<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<gadget id="calculator">7 + 49</gadget>
<output>56</output>

<result>56</result>