If (1/19)=(1/(A))-(1/(B)), where A<B, then what is A/B.
如果(1/19)=(1/(A))-(1/(B))，其中A＜B，那么A/B是多少．
<gadget id="calculator">19 * 18</gadget>
<output>342</output>

<gadget id="calculator">18 / 342</gadget>
<output>1/19 = around 0.052632</output>

<result>1/19 = around 0.052632</result>