It is known that a and b are reciprocals of each other, then ((a)/5)/(7/(b))=how many.
已知a和b互为倒数，那么((a)/5)/(7/(b))=多少．
<gadget id="calculator">1 / 35</gadget>
<output>1/35 = around 0.028571</output>

<result>1/35 = around 0.028571</result>