The city government wants to build a 240-kilometer-long ring road. (1/4) of this road was built in the first week, and the rest (4/9) was built in the second week. How many kilometers are left to be repaired?
市政府要修一条长240千米的环城路，第一周修了这条路的(1/4)，第二周修了余下的(4/9)，还剩多少千米没修？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">240 * (3/4) * (5/9)</gadget>
<output>100</output>

<result>100</result>