watch part has a length of 7 cm on the design drawing and a scale of 8:1. What is the actual length of the part in cm?
一种手表零件，在设计图上的长度是7厘米，比例尺是8：1，则零件的实际长度是多少厘米．
<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>