A and B walk from East Village to West Village at the same time, A travels 6 kilometers per hour, and B travels 7 kilometers per hour. Since it was agreed in advance to return from the original road after a certain number of hours, the speed was 3 kilometers faster than the original speed. As a result, A arrived 6 minutes earlier than B. How many hours would it take for A to return from the East Village to the turning point?
甲、乙同时从东村向西村走，甲每小时行6千米，乙每小时行7千米．由于事先约定若干小时后再从原路返回，比原来速度加快3千米，结果甲比乙早到6分钟，甲从东村回到转处要几小时？
<gadget id="calculator">6 / 60</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 7 * 6</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">(1/10) * 7 * 3</gadget>
<output>21/10 = around 2.1</output>

<gadget id="calculator">(1/10) * 3 * 6</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(1/10) * 3 * 3</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(21/5) + (21/10) + (9/5) + (9/10)</gadget>
<output>9</output>

<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">21 - 42 - 18</gadget>
<output>-39</output>

<gadget id="calculator">42 + (-39)</gadget>
<output>3</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<result>3</result>