The construction team built an 800-meter-long road, and the first phase was 30% complete, and the second phase was 45% complete. How much more meters were repaired in the second phase than in the first phase?
工程队修一条800米长的公路，第一期完成30%，第二期完成45%．第二期比第一期多修了多少米？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(9/20) - (3/10)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">800 * (3/20)</gadget>
<output>120</output>

<result>120</result>