To type a manuscript, it takes 4 hours for Xiao Wang to type alone, and 3 hours for Xiao Zhang to type alone. Now, Xiao Wang plays for 2 hours first, and Xiao Zhang plays the rest alone. How many hours will it take to finish playing?
打一份稿件，小王单独打需4小时，小张单独打需3小时．现在，小王先打2小时，剩下的由小张单独打，还需多少小时打完？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) / (1/3)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>