A precision part is 8mm long. If it is drawn on a drawing with a scale of 5:1, what is the length in centimeters?
一种精密零件长8毫米，把它画在比例尺是5：1的图纸上，长应画多少厘米．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 * (1/2)</gadget>
<output>4</output>

<result>4</result>