The People's Liberation Army conducts camping training. Walk 35 kilometers per day on sunny days, and 28 kilometers per day on rainy days, a total of 350 kilometers in 11 days. How many days are there sunny days in this period?
解放军进行野营拉练．晴天每天走35千米，雨天每天走28千米，11天一共走了350千米．求这期间晴天共有多少天？
<gadget id="calculator">35 * 11</gadget>
<output>385</output>

<gadget id="calculator">385 - 350</gadget>
<output>35</output>

<gadget id="calculator">35 - 28</gadget>
<output>7</output>

<gadget id="calculator">35 / 7</gadget>
<output>5</output>

<gadget id="calculator">11 - 5</gadget>
<output>6</output>

<result>6</result>