On a drawing with a scale of 5:1, the length of a part is measured to be 2.5 decimeters. What is the actual length of this part in centimeters?
在比例尺是5：1的图纸上，量得一种零件的长是2.5分米，这种零件的实际长度是多少厘米．
<gadget id="calculator">2.5 * 10</gadget>
<output>25</output>

<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<result>5</result>