An engineering team repaired the whole road (3/7) in the first month, and 1/4 in the second month. What fraction of the whole road is the remaining work?
某工程队修路，第一个月修了全程的(3/7)，第二个月修了全程的(1/4)，余下的工程占全程的几分之几？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

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

<gadget id="calculator">1 - (3/7) - (1/4)</gadget>
<output>9/28 = around 0.321429</output>

<result>9/28 = around 0.321429</result>