To build a section of road, team A repairs it every day (1/30), and team B repairs it every day (2/45), how much more does team B repair this section of road than team A every day
修一段公路，甲队每天修(1/30)，乙队每天修(2/45)，乙队每天比甲队多修这段公路的多少
<gadget id="calculator">2 / 45</gadget>
<output>2/45 = around 0.044444</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(2/45) - (1/30)</gadget>
<output>1/90 = around 0.011111</output>

<result>1/90 = around 0.011111</result>