To type a manuscript, Party A takes 5 minutes to do it alone, and Party B takes 8 minutes to do it alone. Now let A do it for 3 minutes, and then let B do it for how many minutes to complete.
打一份稿件，甲独做用5分钟，乙方独做用8分钟．现先由甲做3分钟，再由乙做多少分钟完成．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 3</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(2/5) / (1/8)</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>