A person hikes 25 kilometers a day on flat roads and 15 kilometers a day on mountain roads. He walks a total of 295 kilometers in 15 days. How many Tianshan roads did he walk during this period?
某人徒步旅行，平路每天走25千米，山路每天走15千米，他15天共走了295千米．这期间他走了多少天山路？
<gadget id="calculator">15 * 25</gadget>
<output>375</output>

<gadget id="calculator">375 - 295</gadget>
<output>80</output>

<gadget id="calculator">25 - 15</gadget>
<output>10</output>

<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<result>8</result>