A road repair team needs to repair 300 kilometers of roads. On the first day, 63 kilometers were repaired, and on the second day, 86 kilometers were repaired. How many kilometers are left to be repaired?
一支修路队要修300千米的路，第一天修了63千米，第二天修了86千米，还剩多少千米路没有修？
<gadget id="calculator">63 + 86</gadget>
<output>149</output>

<gadget id="calculator">300 - 149</gadget>
<output>151</output>

<result>151</result>