Mr. Wang typed a manuscript. In the morning (4/7), more manuscripts were typed than in the afternoon (1/7). How many manuscripts were typed in the afternoon?
王老师打一份稿件，上午打了这份稿件的(4/7)，比下午多打这份稿件的(1/7)，下午打了这份稿件的多少．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(4/7) - (1/7)</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>