There is a computer part that is very precise. It is drawn on a drawing with a scale of 100:1. The length of the part is 30cm. What is the actual length of this computer part?
有一种电脑零件非常精密，把它画在比例尺是100：1的图纸上，零件的图上长是30cm．这种电脑零件的实际长度是多少呢？
<gadget id="calculator">100 / 1</gadget>
<output>100</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>