Draw a part of a watch on a drawing with a scale of 50:1, and measure the length on the drawing to be 5 cm. What is the actual length of the part?
将一块手表的一个零件画在一副比例尺是50：1的图纸上，量得图上的长度是5厘米，这个零件的实际长度是多少．
<gadget id="calculator">50 / 1</gadget>
<output>50</output>

<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>