The scale of a design drawing is 20:1. The length of a part measured on the drawing is 20 centimeters. What is the actual length of the part in centimeters?
一张设计图的比例尺是20：1，在图纸上量得一个零件长20厘米，这个零件实际长多少厘米
<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">20 / 20</gadget>
<output>1</output>

<result>1</result>