If a and b are reciprocals of each other, then (17/20)/a/b=how much.
若a、b互为倒数，那么(17/20)/a/b=多少．
<gadget id="calculator">17 / 20</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>