The engineering team repairs a 3,500-meter-long highway. On the first day, it repairs the full length (2/5), and on the second day, it repairs the full length (1/3). How many meters are left to be repaired?
工程队修一条长3500米的公路，第一天修了全长的(2/5)，第二天修了全长的(1/3)，还剩下多少米没有修？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (2/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">3_500 * (4/15)</gadget>
<output>2_800/3 = around 933.333333</output>

<result>2_800/3 = around 933.333333</result>