On the design drawing with a scale of 3:1, the length of the precision part is measured as 105 mm. What is the actual length of this precision part?
在比例尺为3：1的设计图上，量得精密零件的长为105毫米，这种精密零件的实际长度是多少？
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">105 / 3</gadget>
<output>35</output>

<result>35</result>