The road repair team completed a road in three months, the full length (1/4) in the first month, the full length (3/10) in the second month, and a fraction of the entire road in the third month ?
修路队三个月修完了一条公路，第一个月修了全长的(1/4)，第二个月修了全长的(3/10)第三个月修了全场的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">1 - (1/4) - (3/10)</gadget>
<output>9/20 = around 0.45</output>

<result>9/20 = around 0.45</result>