It took Xiao Wang (7/10) hours to type a manuscript, which was (1/5) hours longer than Xiao Fang. How long did it take Xiao Fang?
打一份稿件，小王用了(7/10)小时，比小方多用了(1/5)小时．小方用了多长时间？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(7/10) - (1/5)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>