It takes 6 hours for A to complete a single project, and 10 hours for B to complete alone. If you work alternately in the order of A, B, A, B... for 1 hour each time, how many minutes will it take to complete.
一项工程甲单做要6小时完成，乙单独做要10小时完成，如果按照甲、乙、甲、乙…顺序交替工作，每次工作1小时，那么要多少分钟才能完成．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/6) + (1/10)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(4/15) * 3</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/6) * 1</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (4/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">1 / (1/30) / 10</gadget>
<output>3</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 + 1 + (1/3)</gadget>
<output>22/3 = around 7.333333</output>

<gadget id="calculator">(22/3) * 60</gadget>
<output>440</output>

<result>440</result>