On the drawing with a scale of 6:1, the measured length of the part is 2.4cm. What is the actual length of this part in mm?
在比例尺6：1的图纸上，量得零件长2.4cm，这个零件的实际长度是多少mm．
<gadget id="calculator">6 / 1</gadget>
<output>6</output>

<gadget id="calculator">10 / 6</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">2.4 * (5/3)</gadget>
<output>4</output>

<result>4</result>