The ratio of the time it takes for a tailor to make a shirt, a pair of trousers, and a jacket is 1:2:3. He can make 2 shirts, 3 pairs of trousers and 4 jackets in ten working hours. Then how many man-hours will he need to make 14 shirts, 10 pairs of trousers and 2 coats?
某缝纫师做成一件衬衣、一条裤子、一件上衣所用的时间之比为1：2：3．他用十个工时能做成2件衬衣、3条裤子和4件上衣．那么他要做成14件衬衣、10条裤子和2件上衣，共需多少工时．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">2 + 6 + 12</gadget>
<output>20</output>

<gadget id="calculator">10 / 20</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 * (1/2)</gadget>
<output>3/2 = around 1.5</output>

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

<gadget id="calculator">2 * (1/2)</gadget>
<output>1</output>

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

<gadget id="calculator">14 * (1/2)</gadget>
<output>7</output>

<gadget id="calculator">3 + 10 + 7</gadget>
<output>20</output>

<result>20</result>