Divide 86 workers into two groups, one group produces bolts and the other produces nuts. A bolt and two nuts can be made into a complete part. It is known that a worker can produce 12 bolts or 19 nuts in one hour. How many workers should produce bolts?
把86个工人分成两组，一组生产生螺栓，一组生产螺母．一个螺栓和两个螺母就能配成一件完整的零件．已知一个工人一小时可以生产12个螺栓或19个螺母．生产螺栓的工人应多少人？
<gadget id="calculator">19 / 2</gadget>
<output>19/2 = around 9.5</output>

<gadget id="calculator">86 * (19/2)</gadget>
<output>817</output>

<gadget id="calculator">12 + (19/2)</gadget>
<output>43/2 = around 21.5</output>

<gadget id="calculator">817 / (43/2)</gadget>
<output>38</output>

<result>38</result>