Two road repair teams jointly repaired a section of road. Team A repaired (9/10) kilometers in 3 days, and team B repaired (1/2) kilometers in 2 days. How many kilometers does team A repair more than team B every day?
两个修路队合修一段公路．甲队3天修了(9/10)千米，乙队2天修了(1/2)千米．甲队每天比乙队多修多少千米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) / 3</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(1/2) / 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/10) - (1/4)</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>