Only the formula is not counted: to type a manuscript, A and B need (1/2) hours to type together, A needs (5/6) hours to type alone, how many hours does B need to type alone?
只列式不计算：打一份稿件，甲、乙两人合打需要(1/2)小时，甲独打需要(5/6)小时，乙单独打需要多少小时？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / (1/2)</gadget>
<output>2</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / (5/6)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">2 - (6/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / (4/5)</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>