The distance between A and B is 35 kilometers. The truck driver drives 6 round trips every day. How many kilometers does he drive in one day?
甲、乙两地相距35千米，货车司机驾车每天要跑6个来回，他一天驾车共行驶多少千米．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">35 * 12</gadget>
<output>420</output>

<result>420</result>